It's getting on for summer and the will to be serious drains away pretty fast on Friday afternoons now. So this week it's pure escapism that I espouse.
Try your hand at this online game, done in Flash. Though it's called 3-D Logic, there's little about it that uses the sort of logic we use in our workaday world.
I'm told that things get tough around level 16, though I can't report that from my own experience, having only got to level… Well, never mind.