232 out of 250. Never hitting max score in Sierra's games annoys me no end.
A few things you may have missed out on doing:
# Seeing the message on your wristwatch at the very start of the game (and not just hearing the beep). (1 pt) :
Done
# Turning off the beeper on the crashed hovercraft (as modern systems don't always play it). (1 pt) :
Done
# Successfully hiding from the monkeymen search parties (not always needed). (5 pts) :
"Done"
# Not using the jock strap to dispose of the guard at the landing platform (?? pts) :
I didn't do this, I will check it out !
# Typing in the code on Vohaul's computer? (?? pts) :
What code? I didn't know. Will check it out too.
Though I'll admit I'm stumped on what else you could have missed out on doing.
This also assumes you didn't use the score glitch while climbing the tree. : Obiouvsly, I didn't.
Also, there's this: