Good attempt for a second game jam😊!
GAMEPLAY
I read it was your 2nd Game Jam. Not bad at all. Full game cycle with enemies, sound, upgrades etc. The controls were difficult and bit confusing for me. Using WASD and the arrow keys for shooting. Maybe next time use the mouse for aiming and shooting. Did notice that some bullets go right through the enemy but it still get killed. But was fun to get more coins and upgrades and try to last longer.
GRAPHICS/ART
Nice pixel art style. Coherent. Maybe a bit more variation in the environment for a future update and some more particle effects for example.
AUDIO
Soundtrack fitted the art style. Some effects. Nice.
THEME
Ticked both themes and mechanics. Not much but it touched it both.
Nice job. Curious for the next jam game of yours💪!