All of the timers in LDW's real-time games are based on the PDA's system clock (as you put it, Real Life(TM) Human Time), not processor speed. If your PDA clock has trouble keeping time, that could affect your results!

Most developers learned during the transition from the original IBM PC to the PC/AT that relying on the processor speed was a BAD thing to do, as people's action games became suddenly unplayable when they got a new computer! Nobody could keep up with the game.