Simply point and click. If additional instructions are needed, they are provided within the corner of an app. See the in-project Manual for details.
* some apps are not compatible with mobile devices > Welcome to Scratch's FIRST desktop simulator that allows community content! Or, at least I think so based on what I found. > Every app is self contained. To make your own app, see the "APP_testApp" sprite. DO NOT use variables, use LISTS! Update plans: 1. WAY better text engine 2. Improved login/intro GUI 3. Unexpected bug fixes