Start game with

 ...\solomisons.exe -console

 In game press [~] to open the console and type in

 god           God mode
 fly           Flying mode
 notarget      Invisible
 noclip        No clipping mode
 map X#        Skip to map # (1-6)
 endgame       Win game
 timescale #   Set game speed to # (normal is 1)