CODE	KEY IN . . .	EFFECT . . .
1	SXKXYIVT	Infinite time
2	SGOTKLIA	Infinite ammunition
3	SZKVOTSA	Won't take damage from touching enemies
4	SZVVVYSA	Won't take damage from enemy bullets
5	PAOYNILE	Triple normal power on power food pick-up
6	PAXNEILE	Triple normal time on battery pick-up
7	TPXNEILA	Max time on battery pick-up
8	TPOYNILA	Full power on power food pick-up
9	PAESZPAA + SAESLPSP + TTESGPSA	Start on level 2
10	ZAESZPAA + SAESLPSP + TTESGPSA	Start on level 3
11	LAESZPAA + SAESLPSP + TTESGPSA	Start on level 4
12	GAESZPAA + SAESLPSP + TTESGPSA	Start on level 5
13	IAESZPAA + SAESLPSP + TTESGPSA	Start on level 6
14	YAXSAPPE	Use with code 2 to start with machine gun and Cobra gun!