Sorry, I didn't mean that there was a bug. I just didn't notice any real feedback that I'm being hit/losing. Health bar was kinda slowly going down but no real indication that well... I stopped playing! To me in a game like this you should almost immediately get to a "game over" screen :) Just measured it now, roughly 90 seconds of not doing anything before I lost, or does it get harder after some time?
I'm sure it would be a very addictive game with some tweaking and playtesting.