once again this is a game not a perfect reality simulator.... just have fun with it, we developers are trying our hardest to add more fun, basically realistic, and interesting elements.
Yes the photons would reach the black hole, but an outside observer would see them freeze at the event horizon and become trapped there, infinitely red-shifted. But that's from an outside observer's viewpoint, due to relativistic effects. In reality, the photons would indeed reach the singularity of the hole. Also, the photons DO NOT follow a straight path. They follow the shortest possible path between two points in space which, in flat space, is a straight path and, in curved space, is a curved path. Though most of this macro-science falls into the realm of realitivity, not quantum mechanics, except for very near and at the singularity.
EDIT: Sorry, I shouldn't have memory-dumped like that...I'm such a nerd...
EDIT2: Yeah...just, don't worry too much about this post. The dissertation I just gave was admittedly entirely unnecessary.