Thanks for your feedback! Hope you enjoyed playing 😁
I did originally have the homing and ricochet available in the store, but once you unlocked those you could just spam and obliterate everything in the map every time. I decided as to not make things too easy they would be replaced with multi shot and projectile sizes to help the players hit enemies. Combined with the slow down ability or EMP pulse might make things easier.
I'll consider making credits easier to earn so the player doesn't feel as weak in the later levels and I like the particles/screen shake idea you mentioned, not something I thought of!
Appreciate your honesty, hope you got trying the serious mode in the settings 😉