Looks good so far. I like the example card art on the site.
The demo looks viable so far. Nothing leaps out as inherintly off.
Any plans for a solo or co-op mode? This seems like it could play well solo with a little work.
Solo? Hmmm I designed several solo games below but haven't found a way to make a solo game for uSpy.
The Battle of Red Cliffs
Mines of the Sacred Dragon
I will think about it. A solo rule always help for playtesting