The girl's avatar is very cute.
I think the one thing that bothered me the most was how slow the running speed felt and how little stamina you had for as big as the areas got. Would be nice to have either a faster movement speed in general or smaller areas. Could be worth a shot to consider changing out running for dashes consuming energy as well.
The placement of those exploding enemies over ammunition and health felt a bit too frequent. I get what you're going for, but it kind of just felt too cheap to me. Not like it was difficult; I guess I just came to expect it when I saw items in the darkness and it got boring (maybe it would feel better if items were only visible in light like everything else?). I'm sure more enemy variety would also help.
Impressive what you got done in only 2 months. And the lighting change I saw in the Discord looked stellar.
Looking forward to more from you; ganbatte!