This cheats can provide great advantage in the game, but also kill you if you use them too often, so use them wisely.
Super Plasma Bolt - hold down the UP-key for 2 seconds till you hear
"Charge up". Then press fire. This will cost you one hitpoint.
Fireballs - move six or seven times from left to right and then press
jump. This will cost you one hitpoint.
Shield - move six or seven times from right to left and then press
jump. You get a different colour and a shield appears. Last for a
very short time.
Invulnerability - hold down the UP-key for 2 seconds then press the
DOWN-key. You will blink and be invunvulnerable for a very short
time.