So basically, it works like the Descend "If the GM thinks it's a blah check, it's a blah check"? That makes sense. I might actually use this one. My game of Descend isn't going very well, right at the moment.
In fact, I'd love to see you DM'ing a game of STaRS, and with me playing in it.
One more criticism: All races are worth 3 XP points. Why would you ever not play a human? They are all the same power, but the human has more choice. You could make a human and a dwarf who were otherwise exactly the same, because the human can just spend points to have the dwarf's bonuses.