1.3 Update

It's spooky season, so have an update. This one has lots of added/improved/rebuilt internal framework stuff, so unless I'm a genius programming wizard, there will probably be bugs and instability.

Aside from a mountain of technical changes, this version has a new overworld, more underground areas, and collectible treasure.

Known issues (probably OS- and hardware-dependent):

- The game's display output may randomly freeze when loading the world.

- Occasional non-repeating stutters.

Full changelog:

- Remade sky. Flickering artifacts fixed, added sun glare, improved clouds

- Remade overworld

- Reduced foliage pop-in

- Expanded underground areas

- Various graphics and sound improvements

- Added collectible treasure and statistics

- Added gamepad support

- Improved tutorial prompts