So I can't find this game. You're a little dude in a cave and you find a gun and then you just shoot monsters and stuff. I think there are like five huge levels. I can't remember the name of it. It's also kinda pixely... 16-bit?
I don't remember who made it. There was this little dude and you were underground and you found a gun and shot little blobs. Then you collected the little crystals and upgraded your guns and stats. There were four guns total. That's all I can think of at the moment. Thanks!