Cool game, but balancing is not very good. Its not worth it to get Peer or Drain, Bellow and Manifest (Multishot) are the only good things to get with stars. while Peer does become a health beacon, its not strong enough to be worth it.
Recommendations:
Peer - Instead of just being a viewing window that you occasionally access for health, make it so you can actually shoot there, making it a permanent part of the screen AND/OR, make it so that, while it is overlapping with the main screen, it boosts the size of the screen.
Drain - when it does enough, damage, it gives the player health. Give it AI to focus on killing enemies.
Bellow - remove the "Panic Button" part by making it a charged weapon. if you just press it, it does less than currently, but if you hold for a second or two it hits harder than currrently.
Manifest - either make the star cost higher for multishot or implement limits on multishot OR rework it to make the Manifested item appear in the shop (or get its own slot in the shop until you Manifest a different item)
