Hi, thanks for your suggestions. I also think about making the screen shake when shooting but it doesn't work out so well. Jump pad is a good idea. By the way, you said some area seemed hard to get to. Using shotgun or sniper, you can get there by shoot to the ground right after you jump.
Edit:
"Add flashes". Well, I already have a particle system.
The game also has double jump, even triple jump. Press and release the button repeatly to use.
There is a fact you need to know that currently , i'm stop working on this game so you won't get any update of this game in the future. Sorry for that.