I'm impressed by how much is going on here for a 20 second game! Great job with the art and sfx. A couple suggestions:
- It's hard to see both the player and enemy bullets with so much other stuff going on. I'd recommend giving them a white outline and/or making the background a little darker
- The controls are a little confusing at first, especially to board the ship at the end. I feel like interact and shoot could easily be combined, or the interaction at the end could be replaced by something more intuitive (like a down arrow, then board by pressing down)
Otherwise, solid game!