Use mouse for everything. This also means the game is mobile friendly. Link to part 2: https://scratch.mit.edu/projects/362963018/ Keep in mind that I released all these parts at once. Just think of these as a single game. The only reason I separated them because it will probably be too big on one project for Scratch to handle.
@Flyoli designed the crowd and the banner outside M.I.T. Note: Sorry about the low quality in the Scratch transitions. I had to use google images.