It really felt similar to playing risk of rain, so good job on emulating that feeling! It looks good and plays well.
I have a few critiques. I wish the dash was based on movement rather than the last direction you fired. Also the orbs seem to reduce the amount of damage you can do since the delay in attacking enemies seems to be universal instead of based on weapon. I found myself wishing I didn't have them especially when dealing with faster enemies who staying around my hitbox since I could kill them faster if my bullets would connect. I think Terraria has this same design that tends to make summons less useful when using other weapons.
The power-ups aside from the orbs felt fun. I liked the sheer amount of extra jumps you end up getting! My favorite thing to do was to fly above enemies and rain down a shower of bullets! I do wonder if the jet pack could be bound to holding the jump button at any time instead of once you run out of jumps as I had so many I rarely used it.
Great job overall!