My high score is 66 649.
Good concept. Would've liked some procedural generated levels though for more replayability though I do understand it's a high score game. I think you could've used more time on the UI side of things, animations, and polish (Gun reloading, Palettes falling backwards from origin and not just in copy pasted animations for all of them, Varied pitch and sound effects for the Audio, Adaptive Audio?, Scene Loading Animations)
Good job though