Well, joi is for RPGM, Ren'py and HTML, which you can filter for in LATEST UPDATES. Though I can tell you not every RPGM game will run well on it. Probably the more complex it and the more it deviates from stock RPGM controls / game mechanics, the more problems you will have. If you filter for "mobile game" tag, you can find games that have an official Android port, no need for joi.