Aquia is simple in concept, but its puzzles can be quite challenging. On the easiest settings players contend with pushing a pair of vertically oriented blocks into a tower composed of just a few different block colors, but on harder settings they'll be forced to deal with a four-by-four square of blocks, many more block colors, and a much faster moving tower shadow, all of which combine to make things far more difficult. Unfortunately, increased challenge doesn't necessarily equal increased longevity. Aquia can become tedious rather quickly, due mostly to the fact that there are no long term goals. For puzzler lovers, it's worth five dollars, but don't expect to get weeks of entertainment out of it.