Describing The UnderGarden is a very tricky prospect, because every description you could give automatically runs the risk of turning potential customers away. It's a slow-paced game, with no narrative to speak of, and your only goal is to make flowers grow in a series of underwater caves.
Yet The UnderGarden is an absolutely fantastic experience, one that is well worth checking out by all except those blinkered individuals who believes that games must always be about conflict and death. There's very little conflict in The UnderGarden, and no death to speak of. Only life.