Super Slaughter Dungeon

You are a cool dude firing your gun next to a crystal. The crystal heals you but it can also be destroyed by the enemies coming from above. You need to defeat the enemies and gather points, but the more points you have, the more enemies spawn and the harder they get. There are also powerups which can replenish your health, give you extra damage or max health, or restore the crystal's health. Enemies also kill themselves after time, however they don't give you points for that, so be quick and kill them first!
Programs I used: GameMaker Studio 2 Desktop, Paint.NET, Bosca Ceoil