If you are seeing a black screen on your web game, you may need to make a few adjustments to your browser settings. Please follow these steps and let us know if you still have trouble afterwards.

Chrome:
  1. Within the address bar enter the following: chrome://settings
  2. Scroll to the very bottom of the page 
  3. Click on the advanced settings link
  4. Further options will now be displayed. Scroll again to the very bottom of the page
  5. Under the "System" heading there is an option called "Use hardware acceleration when available". Place a check in the box
  6. The words "requires Chrome restart" will now appear. Click on the restart link

FireFox:

Ensure you are updated to FireFox Quantum and this should resolve the issue.