I love as much as I hate those mice ^^
Running around from left to right and right to left is really stressful, and I like how the game puts more gradually on your shoulders; great level design here!
I think i would have liked to know how many room/mission they were in total, because i was always trying the far-far-left and far-far-right buttons to see if i unlocked a new room, since the buttons were still there. But that's no big deal ^^
Congrats on your game!