Congrats on your first jam submission! Also, thanks for the stream the other day.
Here's some of the things I really liked about the game:
- Moving while shooting/being able to move around generally
- Having an upgrade system with some variety to choose from
- The animations on the enemies were cool (blinking and boosters)
- All the core pieces were there (SFX, music, art and mechanics) which gave it a finished feel
I think these small enhancements are worth considering:
- A custom reticle for the mouse cursor
- Maybe separating the upgrades purchase from the win condition, and having the upgrade window automatically appear and pause giving you choices
- Varying the pitch of the shooting sound
It was a fun and solid submission, nice work!