SimTunes

SimTunes is an interactive painting, music, simulation game. The user paints colored squares on a virtual grid, where each color maps to a tone in a musical scale. The user unleashes four little 'bugz' to roam around the grid. Each bugz has an instrument associated with it and when it walks over one of the squares it 'plays' its sound at that tone. The user can control the scale, the instruments, and the speed and direction of the bugz, creating an interactive musical experience. (mobygames.com)