Both the practice mod and the original game run at 30 fps. We try pretty hard to make the practice mod line up exactly with vanilla, and while there are occasionally differences (right now the speed you get from a diagonal dash is wrong by an extremely tiny amount) they should hopefully have a very limited impact on gameplay; we don't know of anything that works in the practice mod but not vanilla or vice versa

THERES A BIGGER JUMP?

Made it!

I was trying to do frogless and mario bounces of the platform. Is this known?

There is already an active tasing community for this game, and most of the levels in the game are pretty optimized, although of course there could still be time to save. The tas gets 1:35.33. So to answer your question we have been testing this for quite a while, and even then the tas still isn't sub 1:30. To get a 1:06, you'd either need to find a completely massive gamebreaking trick or you'd need to optimize to the point where every level is almost as fast as 2100. I don't know why you think 1:06 specifically is possible, but if you have a discovery that you think might help tasing, feel free to join the celeste classic discord and let us know what it is.

Thanks for pointing out this thread's age Kappa

Epic!