Thank you! I watched your YouTube video and saw your rating and actually was surprised at how much you liked it! I was very flattered.
Regarding the back button: I decided very early on that I was not going to make a back button, because I knew I'd have to decide I'd either have combat mechanics or a back button, but not both, given that I have a day job and am a one-man show. But yes, it's on the list of things to add if this were to become a full game.