Interesting concept. Pretty reminiscent of old Flash games. Took me a while to realize that the ammo upgrade is for killing that pink ball but I failed at doing that since the speeds are super high and the field of view is tiny so can't shoo it fast enough. I wonder if I am meant to spam shoot in front of me and is why I should buy lots of ammo.
Would've loved to see more upgrades, maybe affect my direction, or double jump or affect how much of X or Y item spawn in the map.
Overall, fun game. Good work.