This game is designed for two players with a bit of an asymmetrical power structure. The Challenger and The Master. The Challenger starts at level one and aims to win by reaching the last level. The Master reads out the two corresponding words/phrases for a level. The Challenger picks one of the two. The Master then gets to choose how the word is interpreted, and acts on it, either by performing an action on the Challenger or by giving them an instruction to follow. The Challenger must follow all instructions given to them, and allow any actions to be performed on them.
The words and phrases are deliberately open ended, allowing plenty of room for interpretation, and should get dirtier as the levels progress. The Challenger's aim is to advance through the levels choosing the phrases that they believe they will enjoy the most, however they have no control over how they are interpreted and implemented by the Master.
To begin the game the Master can select a simple pose (such as kneeling, hands behind back, back straight) for the Challenger to begin in. They might also select an outfit to be worn or the Challenger might choose one themselves.
If you want to add drinking, you can require the Challenger or both of you take a drink with each level advancement.