Now correct me if I am wrong, but in MArio 64 weren't the rolling boulders actually 3D? In Mario 64 DS they clearly aren't and it annoyed me, considering most everything else looks very good. Surfaces aren't the best, as stated by Dryth, though I noticed it more in Mario than in Metroid. I have played Mario more though, and honestly am more critacal of the game considering that it is a game I already know and love.

Metroid is very fun to play, hopefully it is just the begining of the possibilities for FPSs on the DS.