Two suggestions:
1. Make the blades slightly more noticeable. Maybe add some color to them... it might just be me, but the blades seem to blend into the background (or maybe that's the point?).
2. Place penalty death boxes above, like box seats at a stadium. The main reason here is then people can see and learn what's happening from above. (don't make it like reaver's, where a. your stone is too far away from the window and b. you don't have a clear view of what's happening below).