The Invisibility Game is pretty frustrating but you might find it fun. Just try to move your cursor from the “go” box to the “stop” box without going outside the main box. Sounds easy? Well, it would be easy if only you could see the cursor. Told you it was frustrating! I could never go past level 3.
Really easy with a touchscreen. :)
The password for the final, unbeatable level (even if you cheat and win, you lose) is reallybloodyhard. Check it out.