Complete game on a classic difficulty
Complete 60 levels
Complete first level
Kill 100 gremlins
Complete 10 levels
Complete 20 levels
Complete 30 levels
Complete 50 levels
Complete 40 levels
Complete 30th level on a classic difficulty
Fail 10 times, but complete level
Fail 100 times because of overheat
Fail 100 times because out of energy
Complete a level without touching mirrors
Complete ten levels without fails
Complete game in ZX-skin
Complete five levels without fails