Very cool game, with unique and creative mechanics.
Now the errors:
1- This game is too heavy for a weak computer (like mine), and from what I read in the comments, I am not the only one to have this problem.
2- some levels are very difficult, like the 8th level that I have so far (after relatively long time) failed to pass.
Suggestions:
1- Make this game available to mobile phones.
2- Create a map maker for the community to help develop more maps.
I am Brazilian, so I translated my text into English using the google translator, so if there are any grammar errors in my text it is the fault of the google translator.