Download version aviable

Download version for both Windows, Linux and MacOS were there since I've uploaded the project; unfortunately I didn't notice the files were set as "hidden".  Now the download should be available for all!

What's in the offline version? 

Well, it offer better performance (obviously), but it also offer some other visual improvements. Explosions are now correctly shown (they use blend shapes, which looks like the web version of Godot don't offer; maybe in future updates...). Also ammo trail is visible and some improved graphics effect (such as Depth of field blur instead fog)