A great starting point for your 2D controller. Making use of all the hidden tricks like coyote, buffered actions, speedy apex, anti grav apex, etc
Watch the video: https://www.youtube.com/watch?v=3sWTzMsmdx8
Play the game: https://tarodev.itch.io/ultimate-2d-controller
Feel free to use the code in your production games. Attribution welcomed :)