Open this link: https://tinyurl.com/nowggfullscreen. You should see now.gg load into Roblox but in fullscreen mode.
Once it loads, click privacy and scroll down to where it says COPPA
Click on it and Google Chrome should open.
Change the url to https://tinyurl.com/latergg.
When it says the file might be harmful, click download anyway.
In the "File Downloaded" popup, click open.
Click on install, and then click on open.
Flip the switch at the top right of the screen.
When it says enable support for recent apps press cancel. You should see a taskbar show up.
Click on the following icon on the taskbar, which should fullscreen the time limit window.
Click on the Roblox in the taskbar then you're done!
For other games, you can click on the three dots in the bottom right of the taskbar and select playstore.