Galaxy Defenders (Updated)

A little game I made for the Retro Arcade Game Jam, it is basically done, there will be a update later with a keyboard you can use your arrow keys for when writing your initials for the Score Board.

It's a Shooter Bullet Hell Gauntlet based game, where every round you can chose a new upgrade, and sometimes getting certain upgrades can unlock other upgrades.
I decided to stay so close to the retro style that there are only a certain number of colours, in fact, there are only 7 colours in the entire game.