Okay, playing it now...I am enjoying it for the most part, but a few things are rubbing me the wrong way. SPOILERS!!!
-NO FREAKING GRAPPLING HOOK!!! Oh really Ubi Soft and Tenchu Team? Really? Wow! I can't believe they removed one of the signature Tenchu accessories! Imagine Link with no boomerangs, or Mario with no jump, or Sonic with no suck.
-You can't kill things with your own weapon, only snap necks and stuff.
-Ayame looks fat as hell...like Taki's alternate costume from Soul Calibur III
-Jumping is kind of weird. Sometimes you try to jump up and cling to the wall, but you mysteriously slide down. I shook the damn Wiimote the right way....nope...sliiiiide!
The graphics are surprisingly nice for a Wii game, and also the game is pretty fun despite no grappling/roof action. I also like the voices so far. I wish Rikimaru looked a little more butch, but whatever. The level design is great, and the atmosphere is really nice too. It feels like the first PS1 Tenchu game(minus the grappling hook). Some of the kill scenes are really funny and cinematic to watch. All in all, a nice purchase and a welcome addition to my meager Wii game collection.