In Space Ace you fly a space ship through caves and collect the rings. Use the Ctrl key to fire your booster and the arrow keys to rotate the ship. There are 10 complicated caves in this game and it's highly challenging to complete all the levels. You have to avoid the walls of the caves or your ship will be blown into tiny pieces. But you will lose control of the spacecraft if you go too quickly.
Maneuver The Ship = Left or Right Arrow Keys Fly Your Ship = Ctrl Key