Mute sound and gamepad improvements

v1.0.5

Add contributors to readme

"Amphibious"

• New level "Amphiious" (8)
• Fix camera field of view
• Minor fixes

New icon

• New icon
• New level
• CRT screen retro shader
• Minor bufixes solved

Enjoyable

The game includes:

• 5 levels + tutorial
• Gamepad / touch devices / keyboard support
• Music
• Sound effects
• Full english / spanish language support
• I hope also some fun for you!

Disclaimer, I don't have a OSX machine to test, feedback is welcomed!