Oh yeah ok so the only controls i found out was WASD and LMB, will try to beat my highscore (currently 450ish) with that new knowledge :P
Indeed thought of it but as all shadows are vertical and that there is no strong shadows on the characters lightning suggest more of an ambient light rather than a point light (though i will agree to say it's easier to spot a new big shadow in the chaos of the game)
Plus if i really want to be precise, if the shadow was casting from a point lamp the shadows can be casted vertically only if there is point light over each of them in which case it would make like an area lamp as the count goes up :P