Good, but a bit ridiculous.
Really, must a climbing game be this difficult? The physics might be a bit more realistic, but I felt myself losing far too easily. Climb games should rely on twitch (a certain amount of physics too, of course). If you put a grappling hook in my hand, I'd like it to be whisking me upward, not swinging me to my death that I could've had quicker by falling.
Still, I have to give it a 4 for the graphics and engine, which might be better suited for a true platformer.