If Grassblades was ever to become a game, it'd probably be some variant of RPG. Not sure if I'd want a fully 3D, grand-sweeping-cinematic-vistas thing like, say, Xenoblade Chronicles, or if I'd want something more top-down and pixel-based graphics-y - or if I'd want something in between.
.... Okay, let's be honest, I'd want something that looks like a polished version of Final Fantasy 9. Lovely pre-rendered settings, lots of nooks and crannies to explore, NPCs to grump at, beautiful music, etc.
That, or something similar to Okami, with a bit more of a platforming element.
If Wishlight was ever a game, it'd be more of a point-and-click adventure, which is a genre I dearly love.