A week in - few fixes

Hi all,

A week in, I've pushed a whole bunch of new songs and tweaks or improvements you can see on the other posts.

Today I pushed another patch which introduces two main fixes -

1. The UI doesn't fade in before gameplay, so that it's clear from the beginning of the song.
2. Colour calibration for those who might be struggling to see the faded default colours, you can now swap between a few different default palletes!