I like the music and SFX. I like the graphics. I LOVE the "grappling hook" mechanic; took me back to Bionic Commando. That is absolutely delightful and fullfilling. Your game is a bit too challenging for me - can't complete/beat it - but this is not an indictment on your creativity and development skills. Chalk it up to, "This person [me] just sucks at playing games." :)
Good job!