I rated it 4/5. The art style is great, the music fits the game perfectly and the controls just feel right!
On the other hand, it is not challenging. It is a puzzle game, and you used the same combinations over and over again through the levels (push the two side blocks, then the middle then go through). Also, some levels can be done without using up all the "equipment". Level 20 is a great example.
All in all, a good game, but next time create harder puzzles please!