1) What was the first thought when you guessed where could the hitbox be? Did you have a place in mind or you really couldn't guess it?
I considered hinting at it with grazing (Lunar Bunny Invasion does it!), not sure why I didn't proceed with it, like, the code isn't too complicated since I could reuse the same logic from rocket splash damage, but just check if there's just one nearby enemy's hitbox inside the range (or terrain), that *probably* won't help against super fast bullets, but still.
2) So that shooting with two shots at the once won't become a chore in movement. The idea really is to give a little penalty for maximum firepower to force you to switch to one shot at a time when switching from one enemy pattern to another. I didn't have a lot of fun with bigger speed penalty, it felt too jerky. Didn't have enough patterns to make focused movement idea shine at ig.
3) Ah. Welp. I forgot to add sound effect for thst one. I think I thought about what kind of it to give, then gave up and never returned. Whoops. Sigh... Anyways, it's supposed to give powerups from the right side when you destroy enemies of some kind, but I never got to implement more powerup shots like rocket and (non-existent) lighting, so you might have seen how weapon rank isn't reset after picking up wide shot after you die. I really forgot about it lol.
4) Time-based dynamic difficulty increasing as you go further into the game. I wanted to decrease it if you die, but... I forgot as always :CB_shrug: not really due to crunching, I just forgot