It is a shuttle type game where you fly your craft through ever increasingly complex labarynth of caves that possess enemies to be destroyed that shoot at you and an area mine that wanders that you can't get to close to. It is a tiny ship that must pass through tiny openings. Don't hit the dark green, but you can pass through the light green areas. You will see what I mean. Good luck. PS I never have luck posting screen shots.
Left and Right Arrow keys for direction.
Up key is thrust
Down key turns shields on and off.
You will get a line under your ship when shields are activated by collecting the goodies at about level 3 I think.