The tool in itself is great, however I ran into an issue with the documentation: the tank shooter tutorial uses a "permanent" button when giving the bullets a force that keeps them moving, and said button is gone from the current version. Because of that, bullets stay where they are created when they should be moving in whatever direction they've been fired. A workaround (inspired by the platformer tutorial) is to set an object variable to some specific value when creating a bullet, then create another event to apply the force as long as said variable is set to that value.
Right, Itch.io version is super old I totally forgot to update it! Download the latest one (beta 64) on https://gdevelop-app.com/download