Sushi, Inc.

This is a casual, portrait-oriented idle tycoon game with simple one-handed controls, making it highly interruptible and suitable for short sessions. While it lacks a narrative and can be played offline, its core loop of passive progression and cute visuals offers a cozy experience with high replay value for players who enjoy incremental growth. Monetization is fair, allowing completion without spending, and there are no energy timers to limit play.