Hi! Thank you so much for the feedback!
Let me answer it one by one, but bear with me regarding the explanation :D
First about the dice. An employee need a d12 for tackling / resolving the referee's roll - a d12 for initial & preparation phase and 2d12 for main phase. If the player or the referee turn out didn't have any d12, they could use any dice that could sum up to 12 (2d6 or 3d4). Per phase ideally the referee throw an "encounter" once and the employee should resolve it. But if you want to put up some checks rolls, feel free to include it. Maybe for the checks both referee and employee use d6 for simplicity and easy to differentiate with the main rolls of each phase.
Regarding the proficiency, weakness and fear : my first intention were proficiency, weakness and fear could effecting employee's dice result. In example when an employee get a task relating with computer and they had "Hackathon National Champion" as they proficiency, the referee could give them advantage +1 or +2. Same as weakness. But in Fear I intended to give the employee -3 in their dice result, and an advantage for the referee to +1 their dice roll. BUT, if the players and the referee think this is still unbalanced, please use this as purely narrative.
Ok for (In)Sanity Level, you only go up to Lv. 5 where the employee will be faced with The Truth (which eventually died). This is the max level on (In)Sanity. On level 5, the Employee will encounter things that they shouldn't able to see - symbols, figures, sounds, places. As long as the circles haven't filled up when on this level, they could uncover "The Truth" (whatever it is), but once it filled up, they'll out of the game.
I'm sorry about the phrasing, I'll try to revised it asap :) But yes, that's what I intended to say, four phase per day per player.
Thank you so much for trying The Employee. I hope my answers above helps you even just a bit. And looking forward for your experience playing it :D