You're Borrelnaar, a 'superhero' who shoots nails to kill these 'bubbly entities'. Backstory: You were a normal constructor worker, it's a busy Monday so you're walking to the site with your handy-dandy hammer and and kit of nails. When a crystal falls from the sky into your mouth! You wake up as a new man. Then the entities appear. Instructions: Space to shoot your nails WASD/Arrow keys to move
Fun Fact: The name "Borrelenaar" is a mix of the Dutch words Borrelen ( Bubble ) and Moordenaar ( Killer ).