I found the transformation aspect to be quite lacklustre, the change is small. Having them start as one thing, becoming something else would've been better personally.
As a suggestion of an idea. You could have a side view of the conversion chamber instead of walking of screen, where they transfrom instead of it being an immdiate process, where the room can fill with a smoke.png like in certain comics.
Green can indicate a good hire, red can indicate a bad hire. Where a bad hire could have a 'bad' transformation that isn't condusive to higher profit margines within the company.