Version 1.4.0

This update is mostly about deleting some junk codes and bugfixing as well as adding Fly.

Fly / Seeker Bird now works.

Force now can affect Fly.

Fixed Dungeon's wall collisions.

Fixed Tool/Trap placement bugs.

Fixed some bugs about Gravel.

Decreased Pickaxe durability to 2. (You can still change it from the options whenever you want.)

Fixed some bugs related to Web. (It still has some bugs.)