It was extremely easy to make only like 3 hours. Clicking Simulator if you have played any simulator game you get the gist. Click to get some click(s). Upgrade to get 1 extra click every click. Rebirth for 1,000 clicks and get 10 extra clicks every click.
Originally made with Ready Maker (https://www.getready.io/) but ported over to scratch after I started using scratch so much.