Sorry, I’m a Mac guy, so don’t really know Windows alternatives, but a quick search suggests:
There’s also a webapp Coggle(http://coggle.it).
I haven’t tried any of them, so your mileage may vary!
I use 2 main tools.
http://app.asana.com to organize all my goals in tasks and http://coggle.it/ to organize my ideas.
Here is an exampe of the features of my game, organized in Coggle.
To be honest it looks quite messy. Maybe you should try it again in some specialized midmap app. I can recommend http://coggle.it - I tried it once or twice and it was a delight. You will get very clean layout with great readibility.
But it's just my personal sugestion ;)
Hmm, going a similar way, with every bigger idea I have, I create a new Coggle sheet to do some further brainstorming. Trello I use when I start planning some steps on how to actually accomplish it.