In order to join:

Step 1: Register your account. It’s free, just use your email and a custom username and password.

Step 2: Go to https://scratch.mit.edu/ or https://godotengine.org/online/godot.tools.htmlto create your game (follow the topic).

Step 3: Submit your finished game into the Jam by creating and publishing a project.

Step 4: Submit your published game and paste your recording in community using: https://screenapp.io/#/recorder.

Step 5: Vote and wait for the results!