I enjoy the look of this, and to tell you the truth, I could see this turning into somewhat of a horror adventure kind of game. The look and feel of some of the stuff can seem a bit uneasy and I like that. Maybe you should try your hand in a dark kind of story line with multiple endings? Maybe start with a simple concept, build a demo, toss it out or people to play through and if it goes over, go from there?
I really enjoyed the water effect, it looks very nice.
The only thing I thought was a bit, meh, was the jumping. Its a bit sensitive. It being something that was just worked up, though, I can understand! Keep going at it!
Either way, if you need some kind of music or anything, I'd love to try my hand in creating something for you. Just let me know