I came here to say the same thing, the brush sound effects take me back to sitting on my old Macintosh Quadra, messing around aimlessly -- doodling on kidpix.

I think I played Myst on that machine too.

I actually made a little film about the inventor of Kid Pix last year that you might dig: https://www.youtube.com/watch?v=BxoY-_HQOK0