This is one pretty polished game wow in terms of graphics and audio.
But... Is it not actually possible to keep the bad guys out forever? Do the bad guys only disappear when it enters the gate and we lose a life? How exactly am I supposed to keep the bad guys out? D:
EDIT: Oh okay they disappear after a certain amount of time. I saw some comments that they can cheese the game but it seems I don't know how to do it and completely suck at this game -- I could only manage to score 44 last time XP
Also just noticed that the background becomes darker and darker as more bad guys slip through the gate.
Very amazing concept. Definitely loved it.