i know almost everything about roblox's LuaU but i just started polytoria, what is different?
i was thinking of making boss fighting stages from roblox in polytoria so i can control what the updates are

There are some minor similarities, but I've you understand the basic syntax of Lua, it should not take long to get used to Polytoria's implementation of the language. For example, sometimes when referring to the child of certain things, you must use brackets with the name of the dependant inside quotation marks.

Scripting API/docs are here: docs.polytoria.com/