I like the concept of the game but I think the difficulty of the levels needs to be tweaked a little bit.
I would suggest that when you die you auto respawn or have the level already selected in the menu so all the player has to do is press enter to start the game.
The mechanic is fun, and it was challenging enough that I really had to think and practice to be able to beat the levels.
I wasn't able to play level 2 as it was lagging really badly.