To win Patatrap Quest, you need to be the first player to successfully attack the "Big Bad" in the castle three times.
The castle consists of a wall of mirrors surrounding a central pillar. On a turn, roll the dice, then move a distance equal to either die face or the sum of the die faces. When you land on a space in the castle, your figure pushes down a lever and whatever is depicted underneath that lever is then visible in the mirror. Sometimes you get to collect equipment, sometimes you must swap planks, and sometimes you do other things.
When you have the right equipment and can access the staircase to the top of the pillar, you can confront the Big Bad. Draw the topmost token of its stack, then look at the back of it in secret. If you can discard the item depicted, you collect that token; otherwise, you're ejected from the castle and must start moving in again. The first player to collect three tokens wins.
Patatrap Quest includes five Big Bads, each with its own stack of tokens.