Get Rings, Destroy Cubes

Stranded in an unknown dimension, you have no idea where the ship you're flying came from. All that guides you are two instructions that seem burned into your core. Get Rings. Destroy Cubes. You look around and see many brilliantly lit rings in your path. You try flying through one and instantly your ship is enhanced. After awhile, you notice a cube flying towards you through the air.  Before yo…