AppShed Game Maker is based on Phaser 3.
The Phaser library is updated regularly, closely following the stable release version of the source code library.
The exact version number of the Phaser library can be determined in two ways:
1) Click on the "Status Light" within the simulator (in App Builder or Game Maker)
2) View the Console in the browser. The Phaser version is written to the console when the source code lloads.