Wow! Very clever and simple and with so many well designed levels. Designing and play testing them all, damn.. you didn't slept at all, are you? :D
Although the movement is quite good, I locked my self "countless times" by accident or may lack of skill. I know there is a bomb but it is actually a key element to solve some levels and so some kind of undo mechanic would be nice, even if limited by amount of usages.
I also think that the game could benefit form some exit/goal indicator. Because, i had more than a couple times the situation that i had solved the level but obstructed the path to the exit.
How ever this is a great puzzle platformer!!