Audio changes/fixes

Just pushed an update with a couple of audio-related changes, these include actually playing audio when crossing a mesh line and sounds for the menu buttons.

Never pushed an update with Itch before, so it'll be pretty interesting to see how it goes!

The update will leave your highscore untouched on the leaderboard, however it'll be locally reset as if you were playing on a different platform. Trust me, it's still there :P