Try connecting the power leads on U2 and see what happens. Also check that you have correctly specified the IC type as the program has no data to work on.
(ERROR [PSM] : No model specified for 'U1:A'. ERROR [PSM] : No model specified for 'U1:B.)
I am not sure about your computer game simulator, but in the real world:
R7 is far too low in value, try 220 - 470 ohm
R6 looks to be in the wrong place, it would be bettet to use it as a current limiting resistor between the output of the op-amp and the base of the transistor.
In the schematic above, LM393 comparator U1A is used as a 36 kHz oscillator.
U1B is a buffer which picks up he oscillator signal without influencung the frequency setting.
The signal is passed on to Q9 which switches two Infrared Leds (e.g. from a remote control) at 36 kHz.
The LM393 is used because it can operate at very low voltages down to 2 Volt , a standard opamp can not be used here!