Tin & Kuna is a weird one to recommend for a casual playthrough, but it somehow makes for a really interesting speedrun. It is slower-paced at times and leans more towards being a "puzzle" 3D platformer, but there's some crazy stuff to find if you care to look for it!
www.youtube.com/watch?v=btAq...

Here's the full run - some new strats more than made up for some lost time in world 4!
youtu.be/-NTVxg00sio?...