Looking for new games to run doesn't have to be roblox

Well, it depends. What genres or types of games do you usually like to play? That'll give the biggest hint as to what to recommend for you.

That being said, the tip that usually works for me to find new speedgames is to review any games I liked playing casually (and in particular, games I've played to death and know their mechanics like the back of my hand). If you've replayed it many times, chances are you won't mind doing so for a speedrun (which usually entails resetting runs a lot), and in general it leads you to re-discover the game itself.

if you play roblox games, Boodunnit?! is really good it's a 3D platformer where you solve your own murder! it's available on itch and steam https://www.speedrun.com/boodunnit/