I'll make the grappling faster next time, I agree, and I'll add a main menu too. I was toying with the Quake menu, but I understand why you would want a real one xD.
I know the music wasn't best fit, originally it fit the idea, but with time constraints, the levels didn't match up with it in the end...
I agree also that the execution was "not so good" too xD, in the end I should have spent more time on level design.
Thanks for the feedback!