Unfortunately the web version doesn't work. I looked at the console in the browser and saw:
Uncaught (in promise) TypeError: Permissions check failed
at Object.requestFullScreen (<anonymous>:1:230161)
at Object.toggleFullscreen (dmloader.js:717:18)
It looks like you have checked the Fullscreen checkbox in game.project. The browser is preventing this automatic action, which is the reason why the game freezes. This should be handled better in the engine, but for now you can get around it by unchecking the Fullscreen checkbox and publishing the game again.