diff --git a/app/assets/css/index.css b/app/assets/css/index.css
index 418e668..a055621 100644
--- a/app/assets/css/index.css
+++ b/app/assets/css/index.css
@@ -92,7 +92,7 @@ img.logo {
 img.mascot {
     width: 50%;
     float: right;
-    margin-top: calc(300px - (50% + 12px));
+    margin-top: calc(300px - (50% + 32px));
 }
 
 fieldset {
@@ -372,7 +372,25 @@ div.checkboxes > input[type="checkbox"] {
     font-size: small;
 }
 
+button.load {
+    content: "";
+    transition: background-color 0.3s;
+}
+
+
 [hidden] {
     display: none;
     visibility: hidden;
-}
\ No newline at end of file
+}
+@keyframes backgroundAnimation {
+    0% {
+        background-position: 0% 50%;
+    }
+    50% {
+        background-position: 100% 50%;
+    }
+    100% {
+        background-position: 0% 50%;
+    }
+  }
+  
\ No newline at end of file
diff --git a/app/assets/js/index.js b/app/assets/js/index.js
index fc84e38..e497fd2 100644
--- a/app/assets/js/index.js
+++ b/app/assets/js/index.js
@@ -86,10 +86,18 @@ system.result("server::ping", pong => {
 
 function handleOptionsChanges(key, value) {
     system.call("game::optionSet", { key, value })
+    const span = document.querySelector(`span#${key}`)
+    if (span) {
+        span.innerText = Math.floor(value)
+    }
 }
 
 function handleSettingsChanges(key, value) {
     system.call("settings::set", { key, value })
+    const span = document.querySelector(`span#${key == "ram" ? "currentRam" : key}`)
+    if (span) {
+        span.innerText = key == "ram" ? Math.floor(value.max / 1024) + " G" : value
+    }
 }
 
 system.result("game::parseOptions", options => {
@@ -121,6 +129,9 @@ system.result("player::profile", playerProfile => {
     console.log(playerProfile)
 })
 
+system.result("oculus::getdefaultshaderset", boolean => {
+    sildurs_shader.checked = boolean
+})
 
 window.onload = () => {
     system.call("hardware::ramInformation")
@@ -128,5 +139,6 @@ window.onload = () => {
     system.call("server::ping")
     system.call("player::profile")
     system.call("settings::read")
+    system.call("oculus::getdefaultshaderset")
     startAudio()
 }
\ No newline at end of file
diff --git a/app/logged.html b/app/logged.html
index cd72cad..e3b0e2e 100644
--- a/app/logged.html
+++ b/app/logged.html
@@ -46,10 +46,10 @@
                         Ram alloué
                     </label>
                     <div class="ranges">
-                        <span>
+                        <span id="currentRam">
                             0.5GB
                         </span>
-                        <input type="range" name="ram" min="0" max="2048" id="ram" onchange="handleSettingsChanges(this.name, this.value)">
+                        <input type="range" name="ram" min="0" max="2048" id="ram" onchange="handleSettingsChanges('ram', { max: this.value })">
                         <span id="maxRam">
                             MAX
                         </span>
@@ -59,7 +59,7 @@
                         Distance de rendu
                     </label>
                     <div class="ranges">
-                        <span>
+                        <span id="renderDistance">
                             4
                         </span>
                         <input type="range" name="renderDistance" min="4" max="32" id="renderDistance" onchange="handleOptionsChanges(this.name, this.value)">
@@ -72,7 +72,7 @@
                         Taille de l'interface
                     </label>
                     <div class="ranges">
-                        <span>
+                        <span id="guiScale">
                             1
                         </span>
                         <input type="range" name="guiScale" min="1" max="4" id="guiScale" onchange="handleOptionsChanges(this.name, this.value)">
@@ -100,12 +100,12 @@
                                 Luminsoité max
                             </label>
                         </div>
-                        <!-- <div>
-                            <input type="checkbox" name="sildurs_shader" id="sildurs_shader">
+                        <div>
+                            <input type="checkbox" name="sildurs_shader" id="sildurs_shader" onclick="system.call('oculus::defaultshaderset', { boolean: this.checked })">
                             <label for="sildurs_shader">
                                 Sildur's Shader
                             </label>
-                        </div> -->
+                        </div>
                     </div>
                 </article>
             </details>
@@ -205,7 +205,7 @@
             <section class="center">
                 <img class="logo" src="./assets/img/logo.png" alt="">
                 <br>
-                <button class="play" name="play" onclick="system.call('game::launch')">
+                <button class="play load" name="play" onclick="system.call('game::launch')">
                     Jouer
                 </button>
             </section>
diff --git a/main.js b/main.js
index 98d05a0..78a40a3 100644
--- a/main.js
+++ b/main.js
@@ -1,4 +1,5 @@
 const { BrowserWindow, app, net, dialog, ipcMain, nativeImage, session, shell } = require("electron")
+const properties = require("js-java-properties")
 const msmc = require("msmc")
 const os = require("node:os")
 const fs = require("node:fs")
@@ -46,7 +47,7 @@ async function createLauncherWindow() {
                     contextIsolation: true,
                     preload: path.join(__dirname, "modules", "preload.js"),
                     webviewTag: true,
-                    devTools: true
+                    devTools: false
                 }
             })
             if (os.platform() == "darwin") {
@@ -211,6 +212,9 @@ ipcMain.on("call", async (event, data) => {
         case "auth::reset":
             launcherSettings.set("auth", { token: "", type: "msa", clientToken: "" })
             break
+        case "settings::set":
+            launcherSettings.set(data.args.key, data.args.value)
+            break
         case "shell::openExternal":
             shell.openExternal(data.args.url)
             break
@@ -256,6 +260,19 @@ ipcMain.on("call", async (event, data) => {
         case "app::devtools":
             launcherWindow.webContents.openDevTools()
             break
+        case "oculus::defaultshaderset":
+            const oculusProperties = properties.parse(fs.readFileSync(path.join(app.getPath("appData"), ".catboat", "config", "oculus.properties")).toString())
+            if (data.args.boolean) {
+                properties.setProperty(oculusProperties, "shaderPack", "Sildur%27s+Vibrant+Shaders+v1.50+Medium.zip")
+            } else {
+                properties.setProperty(oculusProperties, "shaderPack", "")
+            }
+            fs.writeFileSync(path.join(app.getPath("appData"), ".catboat", "config", "oculus.properties"), properties.stringify(oculusProperties))
+            break
+        case "oculus::getdefaultshaderset":
+            const $oculusProperties = properties.parse(fs.readFileSync(path.join(app.getPath("appData"), ".catboat", "config", "oculus.properties")).toString())
+            launcherWindow.webContents.send("Response<oculus::getdefaultshaderset>", properties.getProperty($oculusProperties, "shaderPack") == "Sildur%27s+Vibrant+Shaders+v1.50+Medium.zip" ? true : false)
+            break
     }
 })
 
@@ -264,20 +281,51 @@ async function launchGame(restartGame) {
     const downloadQueue = []
     const remoteFiles = await fileManager.getRemoteFiles()
     const localFiles = fs.readdirSync(path.join(app.getPath("appData"), ".catboat"), { recursive: true })
-    launcherWindow.setProgressBar(10, {
-        mode: "indeterminate"
-    })
+    if (launcherWindow instanceof BrowserWindow) {
+        launcherWindow.webContents.send("Response<progress::update>", { type: "landing" })
+    }
+    for (const remoteFile of remoteFiles) {
+        try {
+            const localFile = localFiles.find(file => file === remoteFile)
 
-    launcherWindow.setProgressBar(0, {
-        mode: "none"
-    })
-    dialog.showMessageBox(launcherWindow, {
-        title: "Téléchargement des fichiers",
-        message: "Téléchargement fini."
-    })
+            if (!localFile) {
+                downloadQueue.push(remoteFile)
+                continue
+            }
+            
+            const localHash = await fileManager.getFileHash(path.join(app.getPath("appData"), ".catboat", localFile))
+            const remoteHash = await fileManager.getRemoteFileHash(localFile)
+            if (localHash != remoteHash) {
+                downloadQueue.push(localFile)
+            }
+        } catch (error) {
+            console.error(error)
+            break
+        }
+    }
+    for (const localFile of localFiles) {
+        if (!remoteFiles.find(remoteFile => remoteFile.path == localFile) && localFile.startsWith("/mods")) {
+            fs.unlinkSync(path.join(app.getPath("appData"), ".catboat", localFile))
+        }
+    }
+    for (const item of downloadQueue) {
+        const url = `${config.api.base}${config.api.endpoints.downloadFile}/${new String(item).replace(/\\/g, "/")}`
+        try {
+            await download(url, path.join(app.getPath("appData"), ".catboat", path.dirname(item)))
+            if (launcherWindow instanceof BrowserWindow) {
+                launcherWindow.webContents.send("Response<progress::update>", { type: "landing" })
+            }
+        } catch (error) {
+            if (launcherWindow instanceof BrowserWindow) {
+                launcherWindow.webContents.send("Response<progress::error>", { type: "landing" })
+            }
+            dialog.showErrorBox("Erreur lors du téléchargement des fichiers", error.toString())
+            continue
+        }
+    }
     gamePlayable = true
     launcher.on("close", () => {
-        launcherSettings.webContents.send("Response<game::launch>", { disablePlayButton: true })
+        launcherWindow.webContents.send("Response<game::launch>", { disablePlayButton: true })
         gamePlayable = true
     })
     launcher.on("debug", (log) => {
@@ -286,6 +334,9 @@ async function launchGame(restartGame) {
     launcher.on("data", (log) => {
         console.log(log)
     })
+    launcher.on("data", (log) => {
+        console.log(log)
+    })
     if (gamePlayable || restartGame) {
         const $launchProcess = await launcher.launch({
             root: path.join(app.getPath("appData"), ".catboat"),
@@ -295,6 +346,7 @@ async function launchGame(restartGame) {
                 type: "release"
             },
             forge: path.join(app.getPath("appData"), ".catboat", "forge-1.16.5.jar"),
+            javaPath: "C:\\Program Files\\Java\\jdk-17\\bin\\java.exe",
             memory: {
                 min: 512,
                 max: launcherSettings.get("ram").max
diff --git a/modules/java.js b/modules/java.js
new file mode 100644
index 0000000..8780d77
--- /dev/null
+++ b/modules/java.js
@@ -0,0 +1,182 @@
+const os = require("os")
+const path = require("path")
+const osmeta = require("./osmeta")
+const { exec } = require("child_process")
+const files = require("./files")
+const config = require("../config.json")
+const settings = require("./settings")
+const { dialog, BrowserWindow, shell } = require("electron")
+const AdmZip = require("adm-zip")
+
+function isJavaInstalled() {
+    return new Promise((resolve, reject) => {
+        try {
+            exec(`"${settings.get("javaPath") == "" ? "java" : settings.get("javaPath")}" -version`, (error, stdout, stderr) => {
+                if (error) {
+                    reject({
+                        java: false
+                    })
+                }
+                const output = `${stdout}\n${stderr}`
+                const lines = output.split("\n")
+                const version = lines.filter(line => line.includes("version \""))[0]
+                try {
+                    let matchRegEx
+                    if (version.includes("_")) {
+                        matchRegEx = /(?<major>\d+)\.(?<minor>\d+)\.(?<patch>\d+)\_(?<update>\d+)/
+                    } else {
+                        matchRegEx = /(?<major>\d+)\.(?<minor>\d+)\.(?<patch>\d+)/
+                    }
+                    const versionMatch = version.match(matchRegEx)
+                    const { major, minor, patch, update } = versionMatch.groups
+                    resolve({
+                        java: true,
+                        version: {
+                            major: parseInt(major),
+                            minor: parseInt(minor),
+                            patch: parseInt(patch),
+                            update: update ? parseInt(update) : null
+                        }
+                    })
+                } catch (error) {
+                    reject({
+                        java: false,
+                        error
+                    })
+                }
+            })
+        } catch (error) {
+            reject({
+                java: false,
+                error
+            })
+        }
+    })
+}
+
+async function showJavaErrorBox() {
+    const javaErrorBox = await dialog.showMessageBox(BrowserWindow.getFocusedWindow(), {
+        title: "Mauvaise version de Java",
+        message: "Mauvaise version de Java",
+        detail: "La version de java installé sur votre ordinateur n'est pas compatible avec la version de minecraft utilisé",
+        icon: path.join(__dirname, "code/app/assets/img/java.png"),
+        buttons: [
+            "Fermer",
+            "Installer automatiquement java",
+            "Installer manuellement java",
+            "Utilise un chemin d'accès personnalié",
+        ],
+        cancelId: 0,
+        defaultId: 1
+    })
+    return javaErrorBox
+}
+function installJava(dest) {
+    return new Promise(async (resolve, reject) => {
+        const response = await fetch(`${config.apiServicesURL}/api/java`)
+        const java = await response.json()
+        const arch = osmeta.arch() == "unknow" ? "x64" : osmeta.arch()
+        if (java.downloads[os.platform()]) {
+            if (java.downloads[os.platform()][arch]) {
+                files.downloadFile(config.apiServicesURL + java.downloads[os.platform()][arch].url, path.join(dest, "java.zip"), (error, file) => {
+                    if (error) throw error
+                    try {
+                        const zip = new AdmZip(path.join(dest, "java.zip"))
+                        zip.extractAllTo(path.join(dest, "java"), true)
+                        files.removeFile(path.join(dest, "java.zip"))
+                        if (os.platform() == "darwin") {
+                            exec(`chmod +x "${path.join(dest, "java", "jre-1.8.0_411.jre", "Contents", "Home", "bin", "java")}"`, (error) => {
+                                if (error) reject(error)
+                                resolve(path.join(dest, "java", "jre-1.8.0_411.jre", "Contents", "Home", "bin", "java"))
+                            })
+                        } else {
+                            exec(`chmod +x "${path.join(dest, "java", "bin", "java")}"`, (error) => {
+                                if (error) reject(error)
+                                resolve(path.join(dest, "java", "bin", "java"))
+                            })
+                        }
+                    } catch (err) {
+                        reject(err)
+                    }
+                })
+            } else {
+                reject(new Error("Java are not supported for your OS arch"))
+            }
+        } else {
+            reject(new Error("Java are not supported for your OS"))
+        }
+    })
+}
+
+async function main(requiredJavaVersionMinor, dest) {
+    return new Promise(async (resolve, reject) => {
+        try {
+            const java = await isJavaInstalled()
+            if (java.version.minor < parseInt(requiredJavaVersionMinor)) {
+                const javaErrorBox = await showJavaErrorBox()
+                switch (javaErrorBox.response) {
+                    case 0:
+                        resolve()
+                        break
+                    case 1:
+                        installJava(dest).then(javaPath => {
+                            resolve(javaPath)
+                        })
+                        break
+                    case 2:
+                        shell.openExternal(`https://www.java.com/fr/download/manual.jsp`)
+                        resolve()
+                        break
+                    case 3:
+                        const javaBinPathSelect = await dialog.showOpenDialog(BrowserWindow.getFocusedWindow(), {
+                            filters: [
+                                {
+                                    name: "java",
+                                }
+                            ]
+                        })
+                        if (javaBinPathSelect.canceled) {
+                            showJavaErrorBox()
+                        } else {
+                            resolve(javaBinPathSelect.filePaths[0])
+                        }
+                        break
+                }
+            } else {
+                resolve()
+            }
+        } catch (error) {
+            const javaErrorBox = await showJavaErrorBox()
+            switch (javaErrorBox.response) {
+                case 0:
+                    resolve()
+                    break
+                case 1:
+                    installJava(dest).then(javaPath => {
+                        resolve(javaPath)
+                    })
+                    break
+                case 2:
+                    shell.openExternal(`https://www.java.com/fr/download/manual.jsp`)
+                    resolve()
+                    break
+                case 3:
+                    const javaBinPathSelect = await dialog.showOpenDialog(BrowserWindow.getFocusedWindow(), {
+                        filters: [
+                            {
+                                name: "java",
+                            }
+                        ]
+                    })
+                    if (javaBinPathSelect.canceled) {
+                        showJavaErrorBox()
+                    } else {
+                        resolve(javaBinPathSelect.filePaths[0])
+                    }
+                    break
+            }
+        }
+    })
+}
+
+module.exports.java = main
\ No newline at end of file
diff --git a/modules/launcherSettings.js b/modules/launcherSettings.js
index dda2324..78069c2 100644
--- a/modules/launcherSettings.js
+++ b/modules/launcherSettings.js
@@ -5,7 +5,7 @@ let launcherDataPath = path.join(__dirname, ".catboat")
 
 const baseSettings = {
     ram: {
-        max: 1024
+        max: 2048
     },
     auth: {
         token: "",
diff --git a/modules/osmeta.js b/modules/osmeta.js
new file mode 100644
index 0000000..6a76743
--- /dev/null
+++ b/modules/osmeta.js
@@ -0,0 +1,27 @@
+const os = require("os")
+
+function arch() {
+    switch (os.arch()) {
+        case "x32":
+        case "ia32":
+        case "x86":
+        case "mips":
+        case "ppc":
+        case "s390":
+            return "x86"
+        case "x64":
+        case "arm64":
+            return "arm64"
+        case "mipsel":
+        case "ppc64":
+        case "riscv64":
+        case "s390x":
+        case "loong64":
+            return "x64"
+
+        default:
+            return "unknown"
+    }
+}
+
+module.exports.arch = arch
\ No newline at end of file