OZVKGZVK Infinite time
OXVPPAVK Infinite energy--except when you fall on spikes
GASYZGZA Start with 4 hearts
PAOZNIZA Start with 2 lives
IAOZNIZA Start with 5 lives
SAOSAGVG Infinite lives
For the next two codes the heart meter may look funny
TASYZGZA Start with 6 hearts
ZASYZGZE Start with 10 hearts
For the next two codes the meter shows only up to 9 lives
ZAOZNIZE Start with 10 lives
YAOZNIZE Start with 15 lives
For the last three codes, 1st level only
AIVYGGLT + AIVKXYLT Start with 80 on timer
TGVYGGLT + TGVKXYLT Start with 70 on timer
GLVYGGLV + GLVKXYLV Start with 60 on timer