The mechanics here are solid and it would benefit from further polish.
The music is a great choice for the deck building / resource management portions of the game, but I think something more fast-paced would be good for the action sequences.
There's also a lot left up to chance - the card draws, the ship movement, the direction of the bullets. This has an impact on the resource management aspect of the game - each run I made progressively less money and couldn't figure out what was in my control to improve.
Great work nonetheless!