| Ballarena for one or two players

| Each player uses one joystick instead of the
| usual keys...

| Rotate clockwise     - Stick left
| Rotate anticlockwise - Stick right
| Fire/Start           - Stick up
| Turbo mode           - Fire button

|---------------------------------------------------

| Define movement keys for joystick one
Z         = left_1
X         = right_1
F         = up_1
G         = fire_1

| Define movement keys for joystick two
,         = left_2
.         = right_2
'         = up_2
return    = fire_2
