It's a very charming game - I just love every animation Luigi has - but it's let down by too much backtracking and the lack of a properly intuitive control system. You can either have weird tank control aiming on the second stick, which doesn't gel with camera relative movement on the left stick, or Smash TV style camera absolute aiming on the right stick that requires inconsistent gyro controls for the vertical axis. The latter worked better for me, but still didn't feel right.