Look up Magic Ling Pixel Dungeon!
It's free but you'll need to get it off github as it's Chinese. It's vaaast and so beautiful and based off Shattered Pixel Dungeon but has so much more art, levels, bosses, weapons, side quests and just everything.
Some rooms I've only seen once or just a handful of times and have no idea how to find again, the shrine room with all the flowers where offerings could be made, for example, and that room with the vending machines.