Crypt of the NecroDancer - Crypt of the NecroDancer is a Playable, Action-Adventure, Rough-like, Role-playing, Co-op, 2D and Single-player video game created and published by Brace Yourself Games.
Game Dev Story - Manage your own game company and try to create a million-selling game in this unique simulation.
Dungeons of Dredmor - Dungeons of Dredmor by Gaslamp Games
Pocket Academy - Pocket Academy is a Fantasy-based, Management and Single-player Simulation developed and published by Kairosoft Co.
Moonlighter - Create some headspace & focus on building those ideas
Epic Astro Story - Android - $4.99, apple - $3.99 (Free "lite" version available for both)