My feedback:
I enjoyed switching back and forth between facial expressions. That is a fun game mechanic.
The difficulty spiked once your friend is introduced and you have to manage both of characters' expressions. This is where I dropped off; not because the game got difficult, but more so because I got confused having to focus on three things at once: the rules for my character, the rules for my character's friend, and the incoming people.
An area for improvement would also be the incorporation of the theme. With the facial expressions mechanic you have the 'out', but we never actually get to do anything on the inside.
As someone who didn't work on this game, my other theory is that the 'inside' is going into the palace to get your friend, and the 'out' his helping them escape the palace. If that was the developer's intentions, there might be ways to tie the theme and the mechanic more cohesively in the future.
I hope this feedback helps!