Thanks for your feedback!
Do you have suggestions on how I could make the game less repetitive? The only way I can really think of is to add more and more mechanics, but that has the difficulty of coming up with those in the first place and also might make it too much all at once. Although in hindsight I could've shifted some of the mechanics I add later on to the earlier levels.
I am aware of the scaling issues, I built the game for a 16:9 resolution and haven't spent too much time making it compatible with others yet. This is something I'll fix in a future release!