How can I improve the handling of the cars of my game? They currently feel stiff

https://www.roblox.com/games/4519631442/Bloxy-Roads

To make the cars I made them respond to the vehicleseat input. I made a serverscript respond to input and use that.

What do you think I can improve? Which cars can I improve? I need help.

This is a unique game concept and many people liked this game and saw potential with it but it wasn’t properly executed so I’m doing the patches now and improving it to bring a new experience to roblox.