These are some of the top best unblocked games that you might find from github and will help you for sure :
https://unblockedgames66ezonline.github.io/OvoUnblocked
https://unblockedgames66ezonline.github.io/retrobowl/
https://unblockedgames66ezonline.github.io/fnaf/
https://unblockedgames66ezonline.github.io/Slope/
https://unblockedgames66ezonline.github.io/slither.io/
You might enjoy some of them for sure.