Really impressed with this one. The small scope was perfect. It really let you polish and juice the game which I think is super important and underrated. Shooting behind you is also a great mechanic as it avoids the biggest issue I have with 2D shooters like this. Most mouse-controlled shooters are too easy since you can just place the cursor directly on-top of the enemies to aim, but here the aim is more ambiguous which makes the game more challenging and fun.
This is great for your first game jam. Keep it up!