This is just a little tutorial of how to make a sprite jump and walk forward and backward smoothly; and also it is is pretty simple. If it is going to fast that you can't copy it in time, just press the stop sign when you want it to stop and the screen will be frozen with the picture. Please comment any problems in your game.
I made this all by myself. You should go check out my other games like my best one I made called Stick Fight, here is the link just copy it and pate it in a new tab or just click the website https://scratch.mit.edu/projects/533492413/editor