I thought the idea of fast-paced jumping and shooting to race to the end of the level sort of worked well, if that was intended. I definitely got overwhelmed quickly if I tried to stay and shoot enemies -- they just sort of overwhelmed me at one point. So my best bet was to just run and jump and shoot to get to the end quickly. It's hard to really say what is lacking in this early prototype build -- I'm sure you want to add in visual effects for when the enemies are shot, maybe blink them white before dissapearing them. That's a good trick to make the combat feel more impactful.