well im kinda like a new old player of FF and the same thing that happened to me 3 years ago is happening to me again..
my unity player keeps on crashing and if in the rare occasion it doesnt crash i can barely move my character and its just rlly rlly slow.. i have no idea what im doing and i already tried a lot of methods but none is working! and i've been endlessly trying to fix this problem all day and its getting really frustrating  
 PLEASE HELP IM SO EXTREMELY DESPERATE if you cant already tell

Hi, welcome to the forum!
Don't worry, there are many possible fixes for this.
One of these solutions should fix the problem.
I'll list some:

-Try a different browser.
-Reinstall Unity (Uninstall then restart your computer, install new version, then restart computer again.)
-Delete 'game files' which is an option on the website: http://fusionfall.cartoonnetwork.com/help/uninstall.php
-Try an older version of the Unity web player.
-Try the newest version from the official Unity 3D website.
-Try the BETA version of the Unity web player from FusionFall. (Uninstall Unity web player, launch game
and then it asks you to download it, which will give you the BETA version.)
-Clear your browser caches and cookies.
-Try lowering your in game graphics settings to 'Best Performance'. (Maybe you should even make the
window smaller.)

thanks for the suggestions! will try the ones i didnt try yet 
 thanks a lot!! 

No problem.
If possible, let us know which fixes your problem.

Lol X dat help section is going to come to haunt you.