Коды для уровней:
01. FIRST
02. LIGHTSPEED
03. FIRESTRIKE
04. INVASION
05. TROOPERS
06. EARTHQUAKE
07. STARDUST
08. SANDWORM
09. LIGHTNING
10. SHOCKWAVE
11. ASTEROIDS
12. REBELLION
13. PHOENIX
14. ARMAGEDDON
15. OVERKILL