pretty fun, lovely pixel art, fun & fast gameplay.

Some points to consider:

- desaturate the background so it doesnt contrast so much with the gameplay

- maybe change the boxes to 1/4 the size, or just make them dissapear so the player doesnt mistake them for bullets

- ¿add bombs?

- you can still hear the push button noise from loading menus between stages

- start low with powerups, then go big, similar to 1942

Keep it up with this game, im sure it will evolve into something amazing !