It seems your settled, but in case you come back into this problem or someone else comes here looking for solutions I'll throw my two cents in.
For overcoming writer's block on your own, a lot of my friends on some writer forums I go on say that something to take your mind off the story for a bit can help. Some scribble on paper, others (Which I like this idea more) write a short story comprised of uselessness and random stuff. Just make something useless, like:
"There was a man named Bill. Bill found a shoe in the forest one day that gave him powers to control fire. He then used this power to fight weasel demons in the fourth dimension and save the damsel in distress...."
Since you're not focusing on something your brain identifies as 'work' and more on what you identify as 'a cool game' you brain will stop being blocked and will flow creativity out into the randomosity, then you can finish and go back to the story with the creative mind of a raving lunatic, other people think that since your brain isn't focusing on something it couldn't think of an idea from and now it's getting completely different ideas, it can handle those, then it kinda resets it. Some people say it's just because 'random' is something your brain likes making, and it's very creative, so it boosts your creativity. I dunno, but it works.
Also one thing I like to do is listen to music and get inspiration from that, sometimes I think up something about the actual song, sometimes my mind wanders and visualizes something.