'Sup dudes, as the title says. I press Play, the game seemingly launches in a window, but it's all black and any sort of interaction (clicking, pressing a button) makes the entire window/game turn unresponsive.

Any help? There's precious few google results out there, and none have offered a hint, let alone a solution.

You should provide more information about your system (hardware, OS, etc.) in order to get help.

Anyway, first of all I would try launching the game using its own executable outside Galaxy.