Really nice game. There was some nice increasing difficulty and the large variety of unique powerups was a nice addition (especially since I wasnt expecting this to be a powerup game so that caught me by surprise and was enjoyable to mess with them)
Was a bit empty in the orange to red zones which ended up mostly just being waiting for something to happen. The palette swaps, design of everything, and music were all great though (although music got a bit repetitive since it was being played over and over)
I found a bug where you can glitch the powerups. The buttons are still selectable when the screen is fading out so if you click one when thats happening it resets the fadeout and counts that as a press for the powerup to stack it. Tried it out with the powerup that gives +1 projectile before you have to reload and got 15 projectiles before reloading.
Overall everything works well together and was fun to play