Repetendium is a competent-enough bullet heaven game with a side of mining. You pick a character (auto aim or not, mainly) and a weapon from the usual varieties of shotguns, grenade launchers and lasers at the start. The upgrades you get during a run are mostly stand fare and a bit limited right now, so two runs with the same weapon end up feeling very same-y. It's in early access, so I may check back in after some updates and more content is added. It does have a co-op mode, so I may check that out at some point as well.