well made
The graphics are smooth and well made and I didn't run into any bugs. My only beef is with the control of the character. I also feel that controlling him is bit sluggish. You said you made him stop after a jump for the sake of realism? What's realistic about rocks floating in mid air :P. Your game isn't realistic, why take just one annoying feature from realism.
I dislike the fact that you go to 'climb mode' every time you are touching a ladder. Should rather make a separate button to climb ladders. Also I don't like that your jump height is so low. I understand that you did it so we have to move the rocks and then jump on them etc., but it just feels/looks bad that the character can barely jump 1cm in the air :P.
It's a well made game nonetheless, good job.