Thank you very much for playing it and the good review!
We tried really hard to offer fun and challenging levels. Testing the levels was a main focus for our game but so were so many other aspects (code, art, animation...). Balancing the difficulty was one of the unexpected major issues we had. It might have reflected in some of the levels.
Anyway, we are so glad that you had such a good time playing our game and wish you a really good jam!