Who knew something like Simon Says could be taken in such an eerie direction? Very cool. I especially appreciate the inclusion of the voice acting which really helped sell the creepiness of the doctor. The pixel art and the design of the doctor is well-done. The doctor has that creepy, judging stare down pat, for sure.
Like others had mentioned, it seems the hand-switching isn't always responsive. I thought it was my laptop buttons being messed up until I saw the other comments.
I also noticed a small bug where dialogue would start but the doctor still does a gesture and the meter still drains. Fortunately, it didn't cause any gameplay issues.
Having the doctor testing you to see if you were faking it was a neat twist on the mechanic. I agree with Cosmeeto that having to do it based on sound cues would be a cool idea for another round.
Very interesting and clever take on the theme. The premise managed to intrigue me despite how short the game was. Great job!