240p Test Suite Ported to... COLECOVISION??
forums.atariage.com
There's a diagnostic suite of software for game consoles which tests input lag and screen tearing on your display. This suite first popped up for consoles released at the turn of the century (Dreamcast, specifically), but someone has made a version of this toolkit for... the ColecoVision.
You must understand that while the things the 240p Test Suite does pose no challenge to the Sega Dreamcast, with its full color graphics and its transparencies, they pose a TREMENDOUS challenge to the ColecoVision, a system from the early 1980s with significant visual handicaps. It's outright mind-boggling that this could even exist.
Why are Brazilians so damn good at pushing electronics past their theoretical limits? Did Steve Wozniak start a sperm bank in Rio?