Hi, I've tested your game. I don't find it really fun, but it is REALLY relaxing, and finally a game with ZQSD controls (even though, I would have used the mouse to control the character) !
The game lacks music though and I don't understand what we have to do, except wonder around (maybe that was what we were supposed to do ?). I think you should add a goal to the game.
Also, the boids' movement are really great ! Awesome work !