I had a pretty great time with the game overall, especially on worlds 4 to 6! However, I do have a few nitpicks;
Firstly, the first 3 worlds are way too easy. Of course, every good game has a tutorial, but I got the idea of each new thing within the first 2 or 3 levels of each of these worlds. So I just easily breezed through each of them.
And secondly, the game could use some polish. The shadows are so dark that I couldn't see my characters occasionally and whenever I restart the level, it resets by rotating in the same direction everytime, even when it was in the same rotation as when it started.