I think this game is really fun, the levels are pretty good, and it's great how you get new mechanics so often. I haven't beaten the last level becasue it was too hard, the block with timers go too fast. The background looks nice but other sprites don't really fit it, I know that's because you used kenneys asset pack, but honestly it's better if the whole game fits togheter nicely with the art, than if you have a nice looking background tiles that don't look good with the rest. Some stuff aren't so easy to understand at the start, some quick tutorial level would help a lot with explaining the mechanics (just labels around the world that tells you how blocks work). Also I felt like the game is more of a platformer than a puzzle game, I don't know if that's intented or not. I liked the game and with more polish, levels and mechanics it could be a really nice game, 7/10.