Just click the flag (wherever that is) and press space. I'll try to answer all questions in the comments. (P.S. Thanks for all the positive feedback! I’ll be sure to post another project this weekend.)
This is technically my first 3.0 project, but I made it in the 2.0 editor, so..... yeah. Link: https://scratch.mit.edu/download/scratch2 UPDATE: It’s mobile-friendly now. Tap to move slides also. I'll post other tutorials and stuff for the editor in the future, so stay tunes, and keep Scratching.