Thanks alot for playing, We fully agree with you. A cancel option is really necessary. The freeze somehow lasts a different amount of turns on all computers. For some 1 turn for some infinite turns and for some even the intended 2 :P
Sounds like a bizzare bug! Guess I just got a blessed version of the game accidently :) I should also mention that I played windows version and already had some highscores in the game on my first playthrough (just in case that helps with detecting the issue).
