Gameplay from the long lost second Sonic game, "Sonic Eraser". It's a title that only came out for Sega's Meganet service - a failed Japanese internet add on for the MegaDrive, and was forgotten until a few years ago when it was found and brought into the light.
The game is pretty terrible though, as you can witness as I thrash the computer using nothing but luck. It's a shame, because if this had been a little longer, polished so that it didn't hurt your ears and had some challenge it could quite easily have been a great game. A better idea than Columns anyway.
By the way this is the fan translated version - the original is in Japanese.