Press space or tap the screen to jump if on mobile. Watch out for the pipes! I really improved this game by just simply duplicating the pipe sprite in the past couple of days because it was way too easy from before. Thanks to my brother @Hachey2020_Ray for help on the pipes.
I learned from a platformer tutorial(even though this is not a platformer) that if you want smooth jumping and movement, you have to make variable "y and x". I just did the smooth jumping for this project. Other projects: Colour designer https://scratch.mit.edu/projects/385731570