You can find it here (XNA refresh 1.0 redist not included). I welcome any comments!
At first it started out as a little explore the tower, get treasure thing but in spirit of the contest I thought it needed something a bit different. So I changed it to require gem collection to enable the crawl, which worked out nicely. The downfall of that approach is it means the level design makes or breaks the game. I spent all of 1 hr "designing" the level and trying to get it somewhat of a challenge, but it clearly needs a lot more thought. I also had planned to zoom out and give a better overview of the tower for planning the route with the distance restriction but ran out of time. Will have to revisit this next week or so if I can find some more free time.
Also need to track down some of the rendering bugs, at the last minute I went from a layer approach to using a z order for the sprites to enable some more interesting effects. This worked for the most part but introduced some anomalys that I never got back to before submission.
Overall a very fun experience, I wound up spending about 1-3 hrs each day on it until Today's 4+ hour run - so all told I spent around ~17 hrs on it. Including time to look for art, sound, learn/install XNA (burned an hour to get it up and running on my 360 as well but that was a satisfying journey).