Trippy and Low res do that. The lines are enlargened and and the fever indicator along with it. You have to try and remember where the lines were.
I Don’t think this is a bug because the Trippy power up is Supposed to mess up your screen.
what pc, os and browser do you use?
It looks like a Windows 7 And the browser is Google (But i dont know what pc he owns.)
yh windows 7 school computers