Wario Ware, Inc
My only real exposure to mini-game collections came in the form of the wonderful (but underappreciated) Frobisher Says on the PSVita, but I'd heard good things about this one and it gave me an excuse to play on the RGV40XX. And yeah, this thing is great. To the point that I've got my eldest hooked on it, and I think we'll be investing in the Switch game (not sure which) soon.