I very much enjoy this game! The only thing I would change is maybe adding more contrast. Sometimes the background and objects blend together too much.
Level 25 glitches:
If you drop the bomb through the hole on the right side, it disappears and the screen turns nearly all white. I thought this was a part of the game until I watched the walkthrough for the level. Adding to that, after the bomb has been dropped, there is an invisible square in the area above the door that can be jumped through and sat on top off.
Playing further I've found a bunch more "invisible boxes" that you can jump through and stand on. I'm not sure if this is a intentional or not, but I'm leaning towards it being a glitch.
Also, is the end screen supposed to be just a blue sky with some clouds and no buttons?
Fun Fact: Both Level 18 and Level 23 can be completed without using the bombs, but you receive a lower score (whereas I think we should be rewarded for resourcefulness). Level 26 can be completed using only one.