Congratulations, this is the best game that I played in this jam. You, for sure managed your time well, made a really good number of levels, enemies, and threats.
The game is complete, but maybe in a post-jam version you could add some stuff:
* A score system based on the number of enemies that you kill and how long it takes to beat the level;
*Some songs;
*Powerups, like a "machine gun" and a temporary shield
Congratulations again, you did well!