Need improvement for my action choosing menu

Hi,
So i recently made a post about how to make first-person action choosing thing. I ended up making it using UserInputService and using MouseDelta. But its not very smooth. I would like you to review my progress and say what i can do to improve it!

Game with similar thing:

Heres a place file Test.rbxl (23.6 KB) for you to test what i got.