Wayyyyy too much lag. If you press a color too fast, the whole app freezes. If you press the app when it's frozen, the app just closes. Also, this is the ONLY coloring app I've used where you have to continuosly press the colors. All the other color apps just keep highlighting the next number in sequence. Uninstally & NEVER using again. It's way too frustrating & this is supposed to be a casual fun game. I advise EVERYONE do NOT dl this game & waste your time.