Update 0.6.0 - WIP WebGL build

I am currently optimizing the WebGL browser build.

What works well:

• Mobile support (Android & iOS) with touch controls within browser
• Gamepad support on desktop & on mobile

What doesn't work:

• Blood VFX that was created in Unity VFX graph - needs to be remade as a Unity Shuriken particle effect
• Performance gets murdered after a few minutes of playing

After I am done with matching the WebGL build to the desktop builds, I will continue with the following:

1. Further performance optimizations across all builds
2. Finish & release Android port
3. Additions & polishing of game contents