@AppleArcad: YOU should speak Japanese. You're in the Japanese community. If you can't yourself, what makes you think THEY know how to read English?
And this seems to be a work in progress. IKA will release it once he finished this game and implemented multiplayer.
The ghost is above the item, so it's about the same height when you jump halfway. So if he's on the top left platform, you go to the top RIGHT platform and jump + throw.
I see, that's why you asked "what boots?". You need the boots eventually, but first you need to beat the sneaky ghost.
So you can't go close it, what do you do? Attack it from a distance! You have a weapon (25 of it) that can help you do that.
Today I've seen 3 people saying keys aren't working but every one of them I tried DID work. What's wrong? Server error or user error?
Try again Jackson.
So you found the boots! Well, you're on your own here. If you suck at boss fights like I do, get out the cave and buy a Life Potion, get an injection, stock up your bombs and shurikens, and save the game. You'll beat it eventually just by brute force.
You saw the mural in the dark area right? Did you figure out what it means? Ask the dead archeologist AND your Stopwatch. You'll get the boots if you solve its meaning.