fix: mobile entry click and add fullscreen button

- Delay virtual controls creation until after game starts (ctrl overlay
  was intercepting title screen touches)
- Add touchstart handler on game container for mobile entry
- Add fullscreen button overlay in top-right corner
- Hide title text after game starts

source/document.js

@@ -29,7 +29,11 @@ document.body.innerHTML +=
 		'#btn-right{position:absolute;right:0;top:50%;transform:translateY(-50%);width:48px;height:48px}'+
 		'.ctrl-shoot{width:64px;height:64px;border-radius:50%;font-size:24px}'+
 		'.ctrl-prev,.ctrl-next{width:40px;height:40px;font-size:14px}'+
-		'.ctrl-jump{width:52px;height:52px;border-radius:50%;font-size:20px}'
+		'.ctrl-jump{width:52px;height:52px;border-radius:50%;font-size:20px}'+
+		'#btn-fs{position:absolute;top:8px;right:8px;width:40px;height:40px;'+
+			'background:rgba(255,255,255,0.2);border:1px solid rgba(255,255,255,0.3);'+
+			'border-radius:8px;color:#fff;font-size:20px;z-index:20;'+
+			'display:flex;align-items:center;justify-content:center}'
 		: '')+
 	'</style>'+
 	'<div id="g">'+

source/input.js

@@ -83,7 +83,8 @@ c.onmouseup = (ev) => {
 
 // ─── Mobile virtual controls ───
 
-if (is_touch) {
+// Called from main.js after game start
+create_touch_controls = () => {
 	let ctrl = document.createElement('div');
 	ctrl.id = 'ctrl';
 	ctrl.innerHTML =
@@ -148,5 +149,5 @@ if (is_touch) {
 			if (t.identifier === touch_id) touch_id = null;
 		}
 	});
-}
+};
 

source/main.js

@@ -123,8 +123,28 @@ game_load = async () => {
 	requestAnimationFrame(run_frame);
 
 	f.onclick = () => g.requestFullscreen();
-	g.onclick = () => {
-		if (!is_touch) {
+
+	// Mobile: fullscreen button overlay in top-right
+	if (is_touch) {
+		let fs_btn = document.createElement('button');
+		fs_btn.id = 'btn-fs';
+		fs_btn.textContent = '⛶';
+		fs_btn.onclick = () => g.requestFullscreen();
+		document.getElementById('g').appendChild(fs_btn);
+	}
+
+	// Game start handler
+	let start_game = () => {
+		// Remove the entry handler so it only fires once
+		g.onclick = null;
+		if (g._touch_entry) {
+			g.removeEventListener('touchstart', g._touch_entry);
+			g._touch_entry = null;
+		}
+		if (is_touch) {
+			// Create virtual controls now that game is starting
+			create_touch_controls();
+		} else {
 			g.onclick = () => c.requestPointerLock();
 			g.onclick();
 		}
@@ -157,6 +177,13 @@ game_load = async () => {
 		game_init(0);
 		run_frame = game_run;
 	};
+
+	// Wire up game start: click for desktop, touch for mobile
+	g.onclick = start_game;
+	if (is_touch) {
+		g._touch_entry = (e) => { e.preventDefault(); start_game(); };
+		g.addEventListener('touchstart', g._touch_entry, {passive: false});
+	}
 },
 
 run_frame = (time_now) => {