I bought your masterful game from Mac Game Store a couple of days ago and I tried it today for the first time.
And from the opening sequence I experienced the horror. Glitches are creepier than the undead :)
While the game loads well and the menus are presented pristinely, the proper game showed, since the very start, lethal text glitches during the intro and then during the in-game dialogues.
It seems to be only the text of a particular font (or the particular use of that text - EG: As a title or header), but I have no way to verify this claim.
I am here including a mosaic o 4 screencaps for clarity:
These couple of things can barely be called solutions, but I gave them a shot anyway.
1) Re-started the game. Re-started my computer.
None of these things made any difference.
2) I can't re-install the game since it downloaded fully functional from Mac Game Store just to be dragged into my Applications folder and that unique copy is what I have been using.
3) I played with the Preferences of the game too:
Used it with Anti-Alised turned off and turned on. Same results.
Played with the lowest resolution selected and the highest. Same results.
Operating System Specs
21.5-inch, Late 2012
Mac OSX 10.8.2 (12C2034) Mountain Lion
Processor 2.7 GHz Intel Core i5
Memory 8 GB 1600 MHz DDR3
Graphics NVIDIA GeForce GT 640M 512 MB
If there is any more information you need to solve this mystery, please let me know.