I'm glad to hear you liked the ideas and mechanics.
As someone who learned a lot about game design, but didn't put it too much use (until now), it's very encouraging.
I get what you mean about the tutorial section. On the one hand, I wanted to only have one new or interesting thing per level. On the other hand, you want to get to the interesting part quickly, which is the rewind mechanic. But teaching the player about the basic game elements first is also very important. Hmm, designing great tutorials is difficult, but I think it does the job.
Thanks for playing!
- Claas