Enter the following in the keys section.
Acid - STOS TSX TX TOX
All Accessories - STXOXX TSXO SOX TOY
All Keys - STXTO TX TXTSX MIK
Extra Life - TXSO TX SXO XTO +1 UP
Full Sheilds - TXOS SXO TSXOS BUG
Toggle Cloak - XTO SOTSX TXTO RED
Turbo - TSOX SXO STOXX SVT
Robots Move Faster - TXS STO SXO STO JAVA
