Waste countless hours in what is possibly the most addictive game since Junkbot and Insaniquarium (which, incidentally, I suggest you check out if you haven't already).

I give you: Castle. It starts off slow, but becomes fun - in a mindless, monotonous kind of way. I enjoyed trying to make the game play itself by building my defences to the point where I could go make myself a cup of Chai, come back 20 minutes later, and it would be at the end of the level.

Pointless and boring, yes, but by clicking on this link you must - to a certain extent - be bored and pointless yourself. Defend your castle!