after i beat minos and learned about sishypus, i was trying to find where sisyphus was. i never could find him, so i thought he was a challange or something. at the god damn the sun level, i found the secret entrance and got in the secret level. i sucked at the crash mode, i hated it. but i thought that i'd get to fight sisypus if i got the required amount of coins. i tried it for hours, seriously. then at the end, my only reward was my worst enemy, the crash mode. my dissappointment was immesureable, and my day was ruined
You need to get the secret mission in GREED and then collect EVERY SINGLE BOX in the secret mission before beating the level. After that you can enable it in the cheats menu