In the first Official Update you can expect the following:
More Objectives to direct you so you have specific goals to complete
Outline items to be easily distinguishable in the darkness
Beer mechanics! Cause who doesn't like beer (Careful as its permanent!)
Extra Puzzle: Padlock with numbers
More Audio diversity
Minor Bug Fixes
Before entering the game I advice to try out your microphone in the Main Menu > Options > Test Mic.
You can also select your microphone from the button above
If you have any problems then you might have to make the microphone you want, the default microphone in your computer.