Just a little sound toy I made a while back. It makes a rough emulation of a the theremin (musical instrument) using the Vectrex sound chip and may be controlled by one or two analogue joysticks.
Use analogue joystick(s) to control the V-Theremin.
Button 1 = Toggles Mute
Button 2 = Toggles between 1 and 2 analog sticks for control.
Button 4 (on either stick) allows you to crudely play melodies without moving up and down to control volume.
When using 1 joystick :
Joy 1 Y Axis = Volume
Joy 1 X Axis = Pitch
When using 2 joysticks :
Joy 1 Y Axis = Volume Joy 2 X Axis = Pitch