This app was mentioned in 2 comments, with an average of 1.50 upvotes
It's called Mos Speedrun 2, but it's really more about exploration and finding secrets than just speedrunning - each level has a big, challenging secret area to find and beat, and there's a multi-level puzzle to solve too. I kind of regret keeping the word "speedrun" in the name to be honest as I think it puts people off a bit, although one cool feature we have is that you can play along side your friends' ghosts who have completed the level.
(The video says steam but the iOS version is identical)
We released it last year on Steam, iPhone/Apple TV, and Android. The Apple TV version uses the remote in landscape mode and is actually more usable than I had feared, but it also supports those overpriced bluetooth controllers. Also, your progress syncs between the phone and ATV version via ... magic.
Someone has even started building a wiki about it which is cool.