Kuiper Madness
About
I think everyone should get the concept - especially older folks like me who spent countless hours playing "Asteroids" on Atari or dropping quarters into the arcade game.
You're a scout ship clearing the way through the Kuiper Belt so space travelers have safe passage out of the solar system. You encounter waves of asteroids that you must destroy in order to survive.
My budget was exactly $0.00 and 36 hours. So all the assets are free from either the Unity Asset Store or marked as freebies somewhere in the intarwebs.