Hrm.. Why not add Mario Paint music to the SNES Mario music pack? (And I don't mean stuff made with the music composer, I mean the game's soundtrack.)
There's actually quite a bit to work with in it:
Looping songs:
Title theme
- Distorted variation (first I)
- Yoshi drums variation (second A)
- Wobbly variation (second I)
- Bass variation (N)
- Slow variation (T)
Totaka's Song (aka the song you hear after the O blows up) (surprisingly not a non-looping song)
- Distorted variation (first I)
- Yoshi drums variation (second A)
- Wobbly variation (second I)
(Note: Totaka's song does not have variations for N and T, those just change the music back to the normal title music)
The song you hear when you click on the P
The song you hear when you click on a star after having done the above
The three drawing themes, plus possibly the silent option that features Undodog sneezing every now and then
The special stamp theme
The save robot theme
The three Gnat Attack themes, as well as the boss theme
Non-looping music:
The two sound tracks that can play on the sit-ups cutscene
The level clear theme from Gnat Attack
The game over theme from Gnat Attack