Trimetalisium energy crystals. What are they? What do they do? What does "trimetalisium" even mean? None of that matters. All you need to know is the more trimetalisium energy crystals you collect, the higher your score.

Enemy fighter drones are programmed to stop you in your tracks. Time your salvage efforts carefully, because in the thick planetary atmosphere, you can only move up and down!

(This screenshot was taken with the Stella Atari 2600 emulator.)