It's pretty easy to use. If you hover your mouse over the button, it will get bigger. If you click it, it will shrink. (That is just my code, you can change it easily.) MOBILE USERS - You can still press and hold your finger on the button, without releasing your finger, and the button gets bigger. Then drag your finger back out of the button. If you let go of your finger while it is touching the button, it will click.
I noticed a lot of people were using plain buttons with just a boring "when this sprite clicked" script (no offense). This project can make those buttons more interactive. You don't have to ask me for permission to use it in your project(s), just make sure you give credit. If you're lazy you can just copy paste this text :P "Thanks to @RohanNadkarni for his Button Engine here https://scratch.mit.edu/projects/410471910"