Could not reproduce the crash. I hadn't even played 50 levels at that point, though.
I've reported the launcher issue to HiGuy, we're looking into it.
As for the game crash, can you consistently reproduce the issue, or was it a one-time occurrence? There's been stability issue with Fubar on Macs in the past after playing more than 50 levels without restarting the game, I'm curious if they've risen again.