Yup I had it as well, was OK the first time I tried the Foundary level, got killed, tried again and it went way dark, but yes if you make the brightness higher at the start its playable.
Great game.................. if rather linear, no jumping, erratic and not that intelligent AI and of course no live.
This would be a great live game if set up similar to H2 or PD0.
Nearly 40 games and counting.........