This game is also available on Saturn.
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Level select - ZZZCYX
Invincibility - BABYXX
Rapid fire - YAYAYA
View credits - ZAZACC
Hyper mode - ZABCXY
Level-Phase Password
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2-2 CBYXYC
3-1 XABXAB
3-2 AZCBXC
4-1 YYBBCY
4-2 BAXCXX