Hi,
We're happy that you like the game!
Regarding your feature request, many people have already requested more feet interactions, so those will probably end up in the game eventually, except we don't know when, dev focuses right now on progressing through the story and side characters events.
As for the beating heart sound - cheats are mainly for the dev's debug purposes, it basically does not trigger her waking up - so it's not really meant for public.
Cheers