In the current 0.10.8, if you press Esc during play, you go to the end-of-level screen, not to the browser. The main reason for this is because end-of-level offers to save a replay, and that's the only way to save a non-winning attempt in 0.10.8.
I can add save-replay to the play-interrupting menu, too. This allows:
Win or nuke = go to end-of-level screen.
Esc during play = open play-interrupting menu.
Esc during end-of-level screen = singleplayer browser, as before.
Esc during play-interrupting menu = singleplayer browser (and not end-of-level screen).
Like this, you can press Esc-Esc to go to the browser, as in 0.10. And you can always save the replay, whether you abort or win or nuke.
-- Simon