The sky beyond does have a good blend... and the Title forces one to look inwards as opposed to out... Like hukka above, you could leave your mountain to artistic criticism or fix the texture following u2ser... The rippling water and mountain shadow were well rendered though...
I think I'm confused. Why ask me if I dare to enter when I seem to be already inside? Or am I asked to leave the safety of the tunnel and go out into that open sea...where there seems to be an odd figure dancing on a rock in the center foreground and another in the water to his shoulders with a fish pike in his hand? Nice sky, but predictable rocks. Good water and color.
I recomend you use a different type of mountain/rock texture next time.