When I log on to the screen that flashing. When I take a screenshot it comes up as a black image

Model
- Chromebook hewlett packard

Have you ever been able to log in?

HP has made something like fifty+ different Chromebooks, with very different hardware configurations; could you provide the specific model number of the one you're using?

It'll be something along the lines of "Chromebook 11 G5 EE" or "Chromebook 11-ae0xx", like the list here.

FWIW, I just tested the game yesterday on our Acer Chromebook, with no problems. We'll definitely need more details about your specific hardware / model before we can dig into the issue further.