running through it, it is all text, save for the "Flowering Nightshade" on the Title Screen
which, I assume isn't *text* specifically
Some information I can give, though I can't say with any certainty it would be related
My device runs Windows 8
And I do have two older versions of the game installed
Does the text display properly on the older versions of the game? If so, which versions are those? Also, which Ren'Py versions are listed in the game/script_version.txt files? If it's not a font issue, the best I can think of is that Windows 8 doesn't like changes Ren'Py has made to graphics handling between versions.