During game-play press the 'Action' command to skip events.
To unlock the Cheat menu You'll have to look for Options screen add 'wizardmaster' after the game executable.
In the Jack's house, go to the kitchen. Take the poison near the dumb waiter. And take the Wine near the Washtaufel. Then Use the poison and the Wine. After that, Drink it alot. Be careful, when you drink, your health will be -1000. Repeat the step, until your health will be 32000.