I think that Shift+Enter and Shift+Space already takes care of going
to the top level form. If not, then can you look in the error log. You
should see something which says 'could not parse' and then something.
You're right, there should be more keybindings, I think that is
important. It sounds like you want a subset of the
http://www.emacswiki.org/emacs/PareditCheatsheet Paredit mode.