Astro dev 1.3 - Sound and Art Update

Added a sound system to astro - music and sfx.
Update art to be more realistic.

What's Changed

• Added Sound System to Astro by @adamosnacho in #2
• Art / Sound Update - Astro dev 1.3 by @adamosnacho in #3

Full Changelog: dev-release-1.2...dev-release-1.3