Wow, this is probably the game I spent the most time on :D
Mixing story and gameplay in that way was kind of genius, it motivated me enough to get to the end.
The gameplay seems to have a lot of depth to it with the different kinds of circles but often you don't have time to think about what would be your best move (maybe a turn based game would fit more ?).
Also there isn't enough visual feedback about board movement, making it quite confusing sometimes.
Otherwise, great game !