Beep Boop Boom Box is a game by Patrick Rodriguez/Patchwork Games.

Beep Boop Boom Box (Game Boy)

Beep Boop Boom Box is a “tone matrix”-style music toy where activating squares on the board makes music play. There are two customizable channels to use, as well as a percussion channel on the bottom of the screen. You can change certain aspects of the sounds by opening the settings menu and playing around!