I used to be really into the original Prince of Persia, and got back into speedrunning it quite recently. Someone asked me why I hadn't ever made a game like it, and, well... that's mostly because Prince of Persia, simple as it seems today, is a really hard game to make - it has a lot of subtleties in how the mechanics work that combine to make it very satisfying, something that people who try to clone it usually don't appreciate. (I know - I videoed myself playing some of them and it ended abominably: Please login to see this link. )
I was thinking of taking on the challenge of putting one together in Fusion - has anyone else tried anything in its running-jumping-climbing style?