Yoyo! Thank you so much for the feedback. Having in-game controls and a tutorial was definitely something we missed for this project (and something that we'll ensure to include in the future).
The current controls for head switching are just the number keys above WASD: 1!) Air Conditioning, 2@) Coffee Maker, and 3#) Briefcase. If you do get a chance, we would love feedback on the other heads in the game. Regardless though, thanks for giving it a shot!