I've heard good things about Ittle Dew and its off-site sequel. I've played Lenna's Inception but can't recommend it personally--it leans very hard into procedural generation at the expense of any individual dungeon or overworld being good, with just one very creative exception at the end. If you're not just looking for 2D Zeldas, Tunic is golden.
I'm not sure how strict the etiquette on sticking to itch links only is. If we're okay with offsite links, Zelda Classic (download link, quest database) is a good go-to. This is a 25 year old engine with a lot of history, so uh, quality varies, but some of the quests get genuinely ambitious. Prodigal is also fun.