To access cheat mode, find a well, like the one in the Sharpclaw's shop, and feed it 20 scarabs. It will give you a cheat token.
Take the token to the Warpstone, and choose maze when he asks where you want to go. Find a well in the maze and give it your token by accessing your inventory with the C control stick. The well will give you either a hint or cheat.
To access the cheat, save, and go to the start screen and choose options. Then choose your cheat!