Avoid missiles by flying to the top of the screen.Additionally, press the following keys to activate the corresponding cheat effect.
Avoid rocks on level 8 and level 17 by slowing down.
Avoid infra-red missiles by going to full speed.
| Effect | Key |
| Previous level | < |
| Level skip | > |
| More missiles | G |
| Less missiles | T |
| Extra lives | N |