Demo release: V0.475 alpha

So I made another demo!

Unfortunately, I can't finish the second boss this time.

That's why this version is called V0.475.

Some bugs are fixed as well.

Check readme file for more info.

The unfinished thing about this boss:

- Opening: I will make an intro for this boss as well, just like Gorillini.

- Fourth attack: The "Grab attack" which acts like Takommando.

- Drop weapon when death: Just like Yusha(player character), this boss will drop its weapon when killed.

I can't work on this project (because some internet issue) until 10/9, so next update will be much longer.