Nin2-Jump came a bit out of left field (just wait until you play it), but I don't mean that as a negative. Interesting, different -- these aren't attributes I'd personally complain about. Cave has outed the game as hitting Xbox Live Arcade soon; as in, this week. Better than a day-of announcement, I suppose.
On Wednesday, you'll be able to pick it up for 400 Microsoft Points ($5), which was a wise move on Cave's part. Also worth noting: one-hundred percent of what Nin2-Jump brings in from launch until June 30 will go toward aiding victims of the Tohoku earthquake in Japan.
Good on them. Follow that first link for video footage, or hit up the gallery below for the latest screenshots.