I like this one, but it's far too vague with how the player is doing and WHAT they're doing.
Though trial and error I can roughly figure out the sliders, but sometimes the effect changes feel either too little or too much for one increment change.
And even when I thought I was getting something decent sounding I still got fired. Maybe something like a record exec or producer sitting in the chair and smiling/frowning depending on how good/bad the mix currently is would help. And some timer on screen to indicate how much time is left.
There's a solid idea here, and some almost too good for SBIG art, but it's being hamstrung by confusing gameplay.
Still there's some quality stuff on display here, good work!