Can't help with the crashing, but for the "broken and splintered" characters, turn off any anti-aliasing options you may have in the game preferences. This fixes untold other games too in Leopard.
There has been a log and detailed discussion about this game on Intel, either here or in Apple Discussions (or Community as it's called now). There is a point somewhere near the end of the game that it crashes. As I remember there was no way round this. Google is your friend, even for searching the Apple discussions.