I discovered this very addictive game while visiting a beautifully designed Polish website. I never found out what the website was about because I was too busy playing the site's minigame, Sewer Cleaner. In it, you, as the cleaner, must go through every level cleaning up little blobs of mess. However, you must do this while simultaneously evading sewer monsters. The game is very similar to Pac Man, but with the twist that there's a bit of strategy involved in where to clean up first. The things you clean up actually act as obstacles impeding the progress of the monsters. Very simple game, but incredibly fun.