Castle Arcana isn't a game at all...it's just a delightful, whimsical, hand-drawn castle and grounds full of fun nooks and crannies to explore. Wait, I lied -- there is a hedge maze game. You can even go for a short drive or take home some souvenirs from the gift shop.
AOOA is a very interesting puzzle/game/interactive artwork. You are presented with a phone booth which you are told can take you to other places (not quite like the Matrix). Play around with the various objects in each level to reveal the number to your next destination. There's very little to figure out, so you mostly just get to sit back and look at the nice things.
TheHOUSE looks at first like another haunted house game, but in reality there's nothing to solve -- it's just a click-through spook-fest where you just find the hotspots to keep the shocks coming. With a suitably dark and grim atmosphere, and lots of jump-out-of-your-seat surprises (if you don't handle this sort of thing well, be warned!), this nicely-constructed experience should enjoyably fill a few minutes of your dark and stormy nighttime browsing.
This is a repost, but worth it. La Pâte à Son is a wonderful toy where you can put together pipes and different attachments to construct a music machine. Colorful beans are piped through the system, creating smooth, jazzy music in their various interactions. Apart from actually building the machine, there are plenty of options to play with, like bean number and frequency, and the quality of the notes produced. Great fun.
I'm not sure how to describe Opniyama. Superficially it resembles a platformer game. It's a huge, hand-drawn environment full of strange creatures and doodles, through which you must navigate by walking and jumping with the aid of a sort of grappling gun. Occasionally you will acquire seeds, which you can plant to grow into different kinds of plants. There seems to be no goal aside from the sheer pleasure of encountering odd and lovely things.
Next time: New Samorost-style games.