I just played the demo, wasn't able to do so earlier today (at work). The gameplay is simple and yet interesting and I found it quite relaxing and fun to play. Actually finished all the available levels
Curious how it will play in later levels and if it will remain fun to play. But based on some screenshots I guess it will be quite challenging. And I think with the introduction of the powerups you can change up the gameplay a bit and it seems you got some good ideas for that.
Died a couple of times but that wasnt a huge problem since starting a level over isn't a big problem since it's easy and fast to do so. Whenever I died it felt that I made the mistake, did not feel unfair or something. The collision seemed just a bit to big on some circle saws tho. And can't remember if there was any sound, it slows down but didnt hear something so some extra feedback would be nice I think.
Found the music during the game not really fitting, somewhat creepy? But I do enjoy the music in the menu a lot and I think I would really enjoy listening to that during the game.
Hope that helps in any way. Don't have much time at the moment to write some more, sorry