ok so first off, its kind of fun at the start, which is a good thing. Quickly, many flaws pop up though. so i'm just going to list them
the fire effects that come from one of the upgrades clutters the screen and makes it hard to see actual projectiles, that I need to dodge.
there needs to be a more clear indication that i took damage, such as a screen flash or shake and a SFX, currently its hard to tell.
no map makes backtracking and getting lost easy which isn't a good thing in this case.
I have no idea how certain upgrades worked. E switches items with the one on the ground but that's it. everything else was a mystery.
the blink seems useless and unsafe something like a AOE short range spell or a sprint would be better
it quickly gets repetitive and boring, im sure you are adding more but make sure to up the challenge/ add new enemy's that do more than shoot.
for the love of god add controller support.