how to move an object (character) like flappy bird?

I want to create a game based on the flappy bird logic but with more extras, how would I do it?
what functions would you have to use?

helpme I am a beginner in this. :neutral_face: :neutral_face: :neutral_face:

Take a look at this example:
gametemplates.itch.io/template-candy-dragon

It might help to get started.