v1.13 Content Update

Actually there were more smaller updates, since the previous one,
with lots of small (mostly graphics related) changes/tweaks.
Also fixed a bug where the sword fails to break an item box.

I started working on the game's (IMHO)biggest issue:
when you start the game for the first time, it isn't trivial that gameplay-wise it is critical to use the target-lock; so there will be more messages in-game about the importance of the target-lock, and also there will be some kind of scoring (this feature is in the prototyping phase currently) which will reward the successful use of the target-lock.

Hopefully, it will be ready soon.