You're stuck with a guy and a demon in the same room.
Everything would be fine, but you've got some questionable achievements dumped on you, and you'll have to gift this game to another player to win.

This is a puzzle game with clicker elements.
You have to solve puzzles and click to progress through the story.

In short: read the story, solve the puzzles, click the button.
It's around 1 hour of gameplay, depending on how fast you read, click and think.