Nautilisia is a short, surreal piece riffing on the many many games that take place within the psychological landscape of a comatose (or sleeping, or deceased) protagonist. In contrast with most of those, however, Nautilisia makes no secret of its subject, telling the player up front of this premise, and explaining each symbolic object as one encounters it.
In this vein, there are three very basic puzzles, and a helpfully explanatory NPC who will answer questions and deliver rewards. The gameplay is straightforward, and is likely to take only ten or fifteen minutes to complete. Some of the imagery is charming or evocative, but the narrative voice is so quick to explain what it all means that one doesn't really have time to contemplate it before having it explained away.
This is an experience that is only likely to appeal to one who enjoys Veeder's flavor of humor: if the first room or two don't strike your fancy, the rest of the game isn't likely to either. Personally, I find it engaging enough to enjoy. Veeder has (in my opinion, anyway) an excellent sense of pacing -- of exactly how many times he can push the player's patience and still be funny rather than purely exasperating; of how much he can get away with nudging the player in the ribs without being tiresome.
Overall, a fine execution of a small concept, rightfully brief so as not to overstay its welcome.