Okay. There are some things that are bothering me:
1) Something like a 'Game Over' screen would have been nice since you're not able to restart the game without refreshing the whole site - if I've missed an option, pardon me
2) You don't really get instructions. I mean you don't always get instructions because some things are typical, but in this case... well... what's with this time(?) limit e.g? ^^ I think it's getting less if you're not moving your mouse but this thing also got red eyes while moving so it might be random, too?
3) The game is missing this special feeling you get while achieving something in a game because you could just stare at this red 0 forever if you finally collected all the artefacts and sometimes the thing you tried to defeat might be visible on the edge of the screen a little which I think is not happening on purpose? ^^'
So all in all... it's a game, yes, but it really needs a little improving :x