The pixels and sprites that made up the music bars where the song is played went all glitchy like they were incorrectly aligned. I entered your code and got 13 screens. I have written a description of each. It should be noted that it doesn't always appear. You may get a glitchy bottom section, and when you pop the cartridge back in, everything will be okay and normal.
Nothing is glitched, it acts like nothing happened.
Just in case, if either of these two happen, power off then power on without saving. This is almost always 4. The values of 33 floating point registers in hexadecimal. It had the values of 16 locations in memory. It was set to 0.