very nice game, the level are very hard (I guess that all the level can be finished, I only finished the first one). But the gameplay is really original, good job.

This is a great little puzzle game, really quite challenging, which is good!

This is a clever puzzle concept, and I like the idea. Unfortunately, it starts out a bit too clever for me. Puzzle games like this benefit strongly from a ramp in difficulty, where the mechanics are explored in isolation before applied in concert. 

I found the game very difficult. Maybe it would be nice to have levels with an increasing difficulty level to allow the player to learn gradually.