I think there's potential for a really great game here! Even after reading the instructions, I was having a difficult time understanding how the game mechanics worked. A bit more clarity and visual indicators of what is happening as you are playing would go a long way.
Small side note: The background movement made quite a few folks in my stream motion sick (myself included). I *really* liked the effect, but maybe just slowed down and more subtle would be better.
Nice job overall!