I know cool math is on 1.4.4 but do any websites use older versions?

always use dedragames.com/games/ovo/<the version you want>/

For example: dedragames.com/games/ovo/1.4 or dedragames.com/games/ovo/1.4.2

If you're not already in the Discord server, there's a channel with the list of (almost) all playable versions

OvOplant im doing runs and stuff on school chrome book so no discord. also thanks

Ah, that sucks. Well you're welcome.

You can use awesome guuy's modloader at arjun99ab.github.io/ovo

This website called math playground has the game you are looking for.