This is a real gem of a game you're making here. Combat feels really fluid, and maybe it's because I'm new to it, but when I ran into enemies it felt kind of like getting into a duel as we sized each other up, really fun stuff. Big fan of the retro aesthetic too. Only a few things I made note of and they're really just personal preferences on my part.
* Would be nice to be able to click to advance conversation.
* Slightly disappointed I couldn't jump on top of things. I assume that's to stop people cheesing the AI.
* When reading that manual, my first instinct to move to the next page is to click on the bottom-right hand corner of the right page, and the button to go to the previous page at the bottom-left hand corner of the left page. But that's just my own personal preference.