Well, your font file isn't correct.
It should only contain, at most, 128 characters.
The font files are only good for 128 characters. Starting either from ascii 0 or ascii 128.
It is permissible to have fewer than 128 characters. But AppGameKit does not expect a font file to have more.
I'm quite surprised that it works in Windows. But, then the Windows implementation may be a bit more flexible.
Second, are you that you added the font file (with its text map) to the Resources in your Xcode project? That is usually the most common problem about not seeing the expected images on an iOS device.
Cheers,
Ancient Lady
AGK Community Tester