This is Super Mario Bros. Spend a minute or so watching it as a group, even if you think you know the game pretty well.
As you scroll down you'll be presented with a series of Super Mario Bros. rom hacks. Watch each video for a minute or so and discuss, as a group:
Read these instructions aloud, then scroll down to find the first mod.
For comparison, on the right is the Airman stage of Capcom's Mega Man II. By ATA.
By Leon Arnott.
By Paper Rad and Cory Arcangel.
Sit tight, we'll discuss our findings as a class.