key_trigger {
  input: KEY_A
  action: "left_wheel_fwd"
}
key_trigger {
  input: KEY_Q
  action: "left_wheel_bwk"
}
key_trigger {
  input: KEY_D
  action: "right_wheel_fwd"
}
key_trigger {
  input: KEY_E
  action: "right_wheel_bwk"
}
mouse_trigger {
  input: MOUSE_BUTTON_LEFT
  action: "touch"
}