This is so good for a first jam!! I think the time bending mechanic is really neat and from a programmers standpoint I would think it would be a pretty difficult thing to code. Here's some small things I think could make your game even better:
- Rather than holding "r" to restart, I think it would have just been better to click "r", also the issue came up where I would hold r a bit too long and the screen would glitch.
- A little more variation in the music: I found the background audio a bit repetitive, but I also still want to give you props for trying to make the music yourself. For that I would just keep watching tutorials and videos about making music.
- Keep the AI's sprite facing only one way when the player's x-coordinate is the same as the AI's: I noticed the AI box thingys would flicker when I was on top or below them.
Overall, I would say be very proud of yourself this is a really nice entry and I enjoyed it a ton! I would also really encourage you to keep making games and doing more game jams :)