I get the exact same crash, under sid amd64. It seems to have something to do with the sound.
When the game starts it plays the intro music. As long as the music plays, I can click wherever I want with no crash. When the music finishes, if I click on anything (not just the menu) the game crashes. Now if I turn off both music and sounds while the intro music plays, then I can play without problems. If music or sounds are turned on again, then the game crashes on first click. Therefore it has something to do with the sound. I also tried installing package canberra-gtk-module, to no effect. I should also mention that my machine has no pulseaudio (only ALSA) and the sound chip is a realtek alc892. On another debian sid amd64 machine, with intel sound chip + pulseaudio, this bug is not reproduced. I didn't try installing pulseaudio on my first machine to see whether it makes any difference (why should it?)...
