Dear,
I would like you to make it possible to add the -I option to the pdc specified in playdate_game.cmake.
In the case of Makefile, you can change it afterward by doing something like
$ PLAYDATE_LIB_PATH=/path/to/lib make all
But that's not possible with Xcode.
I'm not very familiar with CMake, so this might be an off-target request, or it might be better for me to prepare playdate_game.cmake by myself.
But I think it would be better if it were included as standard if possible.
Best regards.