Really great game! I love how you used roguelite elements to make the player want to keep playing. Also the sound and music was nice and the clouds looked awesome. The pixel art could use some work and I would avoid mixing pixels sizes in the future. Also, the guns are too expensive. For a jam game, you should be letting the player experience everything in the game within a couple minutes, since that is likely all they will play.
I had fun killing the big squid boss :) Great job!