Wow, this took forever to make. This video includes 252 glitch levels past level 4 in Sonic Spinball. Update: Apparently, I was wrong about there being only 252 glitch levels. The level values are Big Endian, and this was recorded at a time before I knew what that was. There are actually thousands of glitch levels, but there's no way I can fit all that in a video, it would be DAYS long. I will check out the remaining thousands of levels over time, but I doubt I'll upload any. Aside from the levels having different glitch tiles and colors, the levels play out more or less the same.
Here is the P.A.R code to access these levels (Updated on 8-22-16): FF75B0:???? Replace ???? with the desired level