Wow! This is a very solid game!
This is so polished and there is so much levels with very good ideas. I'm very impressed. I have not finished all the levels (currently stuck on 21) but I will for sure!
Love the pacing of your level series too. Once an hard level finished, you give a reward with a little simple level. It's a very good idea.
I have to ask: is it hard to design puzzles like that with only one shape? What's your process?
With a little relaxing music, it would be perfect!
Great job! Hope you will get featured! :D