Pencil Book Quest

From BoardGameGeek:

Pencil Book Quest is a solo, pencil-and-paper adventure designed to be played anywhere. Fight monsters, collect loot, and complete quests in this compact book that easily slips into a pocket or bag. Instead of dice, the game uses a pencil-based mechanic where randomness comes from your own aim and coordination. It's a simple system that adds a layer of tactile challenge while keeping the game fast and portable. With its compact components, no setup, and the ability to pause and resume anytime, Pencil Book Quest is perfect for commutes, waiting rooms, standing in line, or any moment when your brain needs a short side quest. -description from the designer