@exomatt: He shouldn't be able to kill guards.. would make it too easy, but I think it'd be cool if the boss avoided you when the alarm was on, maybe when it goes on he gains a sight and if he sees you he starts running from you, but not faster than when you hold Z so you could still get him if need be. Overall though, I loved the game, just as much as the first one. 5/5
It's a neat ideae, and pretty fun game. I agree with Colino, more levels and colors later in the game.. And if you still want it to be like this endurance type just add an endurance feature to it. If you do add more colors, it might be a better idea to set them to keys instead of the mouse tho. Good job on the game tho, I did find it really easy if you just sit in the corner.. might try fixing that. Good job tho =)