diff --git a/package.json b/package.json
index a7dbcaa..7dd90e9 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,9 @@
 {
   "name": "open-plutonium-launcher",
-  "version": "0.0.1",
+  "version": "0.5.4",
   "description": "Open-source Plutonium launcher",
   "main": "src/index.js",
-  "repository": "https://gitea.x3f200c.net/X3F200C/open-plutonium-launcher",
+  "repository": "https://gitea.x3f200c.net/Kroniker/open-plutonium-launcher",
   "author": "X3F200C",
   "license": "GPL-3.0",
   "scripts": {
diff --git a/src/index.js b/src/index.js
index 753997c..341c42c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,5 +1,6 @@
 const path = require("node:path");
 const fs = require("node:fs");
+const child_process = require("node:child_process");
 const nodeGUI = require("@nodegui/nodegui");
 
 var configFile = path.join(process.env["APPDATA"], "open-plutonium-launcher.json");
@@ -24,11 +25,14 @@ const games = [
 			{
 				"id": "mp",
 				"name": "Multiplayer"
-			},
-			{
-				"id": "sp",
-				"name": "Co-Op/Zombies"
-			}
+			}// ,
+			// {
+			// 	"id": "sp",
+			// 	"name": "Co-Op/Zombies"
+			// }
+		],
+		"checks": [
+			["main", "iw_00.iwd"]
 		]
 	},
 	{
@@ -43,6 +47,9 @@ const games = [
 				"id": "sp",
 				"name": "Co-Op/Zombies"
 			}
+		],
+		"checks": [
+			["main", "iw_00.iwd"]
 		]
 	},
 	{
@@ -57,6 +64,9 @@ const games = [
 				"id": "sp",
 				"name": "Co-Op/Zombies"
 			}
+		],
+		"checks": [
+			["main", "iw_00.iwd"]
 		]
 	},
 	{
@@ -71,6 +81,9 @@ const games = [
 				"id": "zm",
 				"name": "Co-Op/Zombies"
 			}
+		],
+		"checks": [
+			["zone", "all", "base.ipak"]
 		]
 	}
 ];
@@ -86,6 +99,115 @@ function writeConfig(asDefault = false) {
 	fs.writeFileSync(configFile, JSON.stringify((asDefault ? defaultConfig : config)));
 }
 
+function showMessage(content) {
+	var messageBox = new nodeGUI.QMessageBox();
+	messageBox.setText("Information");
+	messageBox.setInformativeText(content);
+	var okButton = new nodeGUI.QPushButton();
+	okButton.setText("OK");
+	messageBox.addButton(okButton, nodeGUI.ButtonRole.AcceptRole);
+	messageBox.exec();
+}
+
+function showError(content) {
+	var messageBox = new nodeGUI.QMessageBox();
+	messageBox.setText("Error");
+	messageBox.setInformativeText(content);
+	var okButton = new nodeGUI.QPushButton();
+	okButton.setText("OK");
+	messageBox.addButton(okButton, nodeGUI.ButtonRole.AcceptRole);
+	messageBox.exec();
+}
+
+function showPrompt(question) {
+	var dialogBox = new nodeGUI.QInputDialog();
+	dialogBox.setLabelText(question);
+	dialogBox.exec();
+
+	return dialogBox.textValue();
+}
+
+function chooseFolder() {
+	var fileDialog = new nodeGUI.QFileDialog();
+	fileDialog.setFileMode(nodeGUI.FileMode.Directory);
+	fileDialog.setNameFilter("Directories");
+	fileDialog.exec();
+
+	var entries = fileDialog.selectedFiles();
+
+	if (entries.length < 1) {
+		return null;
+	} else {
+		return entries[0];
+	}
+}
+
+function checkPlutonium() {
+	var bootstrapperPath = path.join(config.directories["plutonium"], "bin", "plutonium-bootstrapper-win32.exe");
+
+	if (fs.existsSync(bootstrapperPath)) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+function checkGame(id) {
+	var game = games.find(g => g.id == id);
+
+	if (!game) return false;
+
+	for (let c = 0; c < game.checks.length; c++) {
+		var check = game.checks[c];
+		var checkPath = path.join(config.directories[id], ...check);
+
+		if (!fs.existsSync(checkPath)) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+function launchGame(gameID, modeID) {
+	if (!checkPlutonium()) {
+		showMessage("Please select Plutonium's folder. ");
+		config.directories["plutonium"] = chooseFolder();
+		if (!checkPlutonium()) {
+			return showError("Sorry, we were unable to find Plutonium's files. ");
+		}
+	}
+
+	var game = games.find(g => g.id == gameID);
+	if (!checkGame(gameID)) {
+		showMessage("Please select " + game.name + "'s folder. ");
+		config.directories[gameID] = chooseFolder();
+		if (!checkGame(gameID)) {
+			return showError("Sorry, we were unable to find " + game.name + "'s files. ");
+		}
+	}
+
+	if (config.username.length < 1) {
+		config.username = showPrompt("What's your username ? ");
+		if (config.username.length < 1) {
+			return showError("You must enter a username ! ");
+		}
+	}
+
+	writeConfig();
+
+	var bootstrapperPath = path.join(config.directories["plutonium"], "bin", "plutonium-bootstrapper-win32.exe");
+
+	var gameProcess = child_process.spawn(bootstrapperPath, [gameID + modeID, config.directories[gameID], "+name", config.username, "-lan"], {
+		"cwd": config.directories["plutonium"],
+		"stdio": "inherit"
+	});
+
+	gameProcess.unref();
+
+	process.exit();
+}
+
 if (!fs.existsSync(configFile)) {
 	writeConfig(true);
 }
@@ -96,9 +218,15 @@ var mainWindow = new nodeGUI.QMainWindow();
 var mainWidget = new nodeGUI.QWidget();
 mainWidget.setObjectName("root");
 
-var rootLayout = new nodeGUI.FlexLayout();
+var rootLayout = new nodeGUI.QBoxLayout(nodeGUI.Direction.TopToBottom);
 mainWidget.setLayout(rootLayout);
 
+var gameSel = new nodeGUI.QBoxLayout(nodeGUI.Direction.LeftToRight);
+
+var gameSelectLabel = new nodeGUI.QLabel();
+gameSelectLabel.setText("Select a game : ");
+gameSel.addWidget(gameSelectLabel);
+
 var gameSelectionBox = new nodeGUI.QComboBox();
 for (let g = 0; g < games.length; g++) {
 	var game = games[g];
@@ -113,10 +241,21 @@ for (let g = 0; g < games.length; g++) {
 		gameSelectionBox.addItem(undefined, game.name + " " + mode.name);
 	}
 }
+gameSelectionBox.setToolTip(config.directories[gameSelections[0][0]]);
 gameSelectionBox.addEventListener("currentIndexChanged", function (index) {
 	selectedGame = index;
+	gameSelectionBox.setToolTip(config.directories[gameSelections[index][0]]);
 });
-rootLayout.addWidget(gameSelectionBox);
+gameSel.addWidget(gameSelectionBox);
+rootLayout.addLayout(gameSel);
+
+var launchButton = new nodeGUI.QPushButton();
+launchButton.setText("Launch");
+launchButton.addEventListener("clicked", function () {
+	var selection = gameSelections[selectedGame];
+	launchGame(selection[0], selection[1]);
+});
+rootLayout.addWidget(launchButton);
 
 mainWindow.setCentralWidget(mainWidget);
 mainWindow.setStyleSheet(`
@@ -126,6 +265,6 @@ mainWindow.setStyleSheet(`
 	}
 `);
 mainWindow.setWindowTitle("Open Plutonium launcher");
-mainWindow.resize(854, 480);
+// mainWindow.resize(427, 240);
 mainWindow.show();
 global.mainWindow = mainWindow;