Here are videos of a game and its clone:
Q Bert (original):
https://www.youtube.com/watch?v=karPYs22ACc
J-Bird (clone):
https://www.youtube.com/watch?v=XnDRpIdz0Uo
And here's another example using a Pac Man clone known as Mouse Trap:
https://www.youtube.com/watch?v=DxTSk77QxBQ I assume you're all familiar with the original, so I won't post a video of that.
In essence, they're the same games with new names and different graphics. I think you guys are [mostly] smart enough to get the point behind my posting this without me actually explaining the point, so that is all I will say for now.