For what it’s worth, I’ve played Donsol and Card Crawl and they are both killer, but very different. The former is more bare-bones and “one off”, like the oldskool Rogue it draws from. The latter is fancier and has more persistent RPG-esque elements. Either will happily keep you occupied on your daily commute.
- Though mobile app making is hardly the only place this sort of this occurs… ^