Here are a few that haven’t been mentioned yet:
Dream Quest: I may have repeated this rec on a different thread, but this is a fantastic deck builder that you can play over and over. The art was drawn by the developer’s young daughters so…not good. But it’s a fantastic game with deep mechanics and many classes and cards to unlock.
Severed: A great swipe to attack/defend game similar to Infinity Blade. The art is distinctive and the music is haunting and atmospheric while still remaining engaging.
Cardinal Quest 2: A rogue-like dungeon crawler which is now free! 6 classes with branching skill trees and several different map/monster sets gives it long legs.
Grand Prix Story: Of the very large family of Kairosoft games, this is the one I still have on my phone. The core loop of win races, train drivers, research parts, build cars is really addictive. Honorable mention goes to Game Dev Story (of course).