I just spent the weekend playing this, and wow, what fun. When it originally came out on 3DS last year, I remember a few friends praising it a lot, and so figured I would eventually get it. It’s a digging/mining game in which you try and uncover new areas, upgrading your robot with new gear by also mining gems along the way. Creating your maps on the way down is surprisingly addictive, and the controls are just right. It’s around $10 or less on the eShop, and I can’t recommend it enough.