Very stylish effects on the screen. I love the main menu! The game itself is also fun. Great variety of enemies and good use of the theme.
Sacrificing weapon speed and damage is really painful. Maybe it would be more fun to start out with auto-fire and spread shot and sacrifice those instead. That makes it similar to the double-jump where you feel like that was a bonus you had before and now you are “normal”. And not going from “normal” to “bad”.