The game's RPG and fighting system gets a little bit deeper the more you learn about it. You start to notice which foods give you what stats (I love chow mein early on personally), and you discover the all-special books which teach you lightning fast punches and kicks. Later on, you find expensive shoes, visit a sauna instead of an inn, and stock up on vitamins.
But there are so many damn food choices how the hell am I supposed to figure out what does what? I guess I could buy one of everything, but I'm too busy for something at stupid as that. And why is my Max Power always maxed out? How do I increase the max? Killing enemies doesn't seem to gain experience, so as far as I can tell, you only level up by eating.
Some of the stats are self-explanatory (Punch, Kick, Weapon, Throw, Agility, Defense), but others are completely obscure. What the Hell is Strength, and how is it different from Punch/Kick? Will Power? Which one increases the length of your life gauge--Stamina or Max Power? What's the other one do?
I've bought a few of the books, but I have no idea what any of them do before you buy them. What the Hell is Indian Lore?
Visit a Sauna instead of an Inn? I haven't even come across an Inn yet (that I know of). What's an Inn do that eating food doesn't? What about the Sauna?
There seems to be an incredibly deep game here, but the lack of any explanation whatsoever makes it hard to accomplish anything without feeling like I'm stumbling around in the dark.