A while ago I created Flappy-Bird as a basic Scratch file and posted it here on my blog and put the basic files in Dropbox. Since then I have done some work that will hopefully come in useful if you want to create this game in class.
Click here for the introduction and links to all of the lessons. All the game saves at various points to match the lessons, graphics, and sounds are available in the same Github repository.
I hope you enjoy using it!
If you like it/use it, please feel free to comment below.