Like Dravenae said, it's part dating sim, so the bar cut scenes are half of the game. Unlike Metal Gear (that has a million different ways to play) there isn't much to do besides the same puzzles and cut scenes. Truth be told, the gameplay in this is VERY repetitive, even for a puzzle game. There are 9 levels I think, where basically the only object is to reach the top. For me, the cut scenes were a way to take a breather between very tedious climbs (I'm looking at you, chainsaw baby). But if the puzzle aspect is what drives you, then I "think" there is a mode to just play the puzzles and forget the story all together.
Addendum: According to youtube, all cutscenes added together, plus a single ending, is about 2.5 hours. That doesn't count the puzzle times...which depending on skill could take hours each to figure out. Compare that to the 9+ hour MGS 4 cut scenes, and you have a significantly shorter game.