Congratulations on your first jam! I like the smooth, simple art style. A couple points of feedback:
- Unlike some others, I am OK with the controls as they are… I think they are pretty standard for a top-down shooter.
- It felt a little too zoomed in. I had to get uncomfortably close to enemies to see them.
- Level transitions were sudden and unexpected, as others have said.
- I felt like I ran out of ammo very fast and eventually got stuck on a level with an enemy left, but no ammo refills. I could not find an exit to the level. It felt like I had no option but to sit and die or run away forever. In this case it might be nice to have a slow ammo regen or something so players have at least one “exciting” option in this scenario. (For example, a FPS would have at least a melee attack so I could run in and die trying.)
Nice submission, well done, and congratulations again on your first jam. :)