It's probably too late for game-wide suggestions, but it'd be nice to have a small "..." in the corner or something to indicate that advancement requires a click. There seems to be a lot of "blank" screens with no text, and I'm not sure if the scene is loading, or something until I click.
Also, regarding the music; perhaps there should be more playlist-like options; shuffle, repeat, auto-advance to the next track, etc.
Currently, the selected track will play ad-nauseum until changed, which means breaking gameplay to pop into the music menu and manually change the track.
EDIT: Ahh.. there's the toolbar!.. Mebe I should play a little longer before making suggestions?
However, this still remains a suggestion; an option to force music relevant to the scene.
Just fiddling around with UI/Gallery/etc.. really cool!
OK, back to the music.. still gameplay breaking to have to pop into a menu to change the music.
Rolling back seems to interrupt the music.. perhaps the music "layer" can be coded to ignore rollback functions?