Some notes in no particular order:
- The low text contrast on the menu makes it slightly hard to read.
- Menu button sound was kind of weird
- Cool text animations
- The bloom and effects were really cool, but maybe a bit too much bloom?
- The push button, go through door, puzzle was repeated maybe a bit too many times
- It got a bit hard when there were lots of bullets, and the instadeath restart eventually was so hard I eventually gave up (I think at level 5 or 6)
- I was a bit disappointed that the puzzles weren't more... puzzly. It was mostly a case of finding all the buttons and avoiding all the bullets. I wish the rewind was more involved in some way.
Reading the list, it sounds like a lot of negative stuff. But I still enjoyed the game a lot. It felt pretty polished, and I think the look is really cool and with some tuning it could be amazing.
Good job! :)