Definitely lands the theme really well... the music did grate on me a wee bit, but guess the 8-bit matches the pixel art etc. I would have loved to have a bit more control over the outcome though as it was a bit overly random.
Maybe having only 1 or 2 poisoned biscuits and allowing the player to keep eating if they want to (up to a maximum of 3 or something) and then the turn over. Would mean that the player would be calculating the risk each time. Maybe you could have one pass as well (or even sell 2 points for a pass) or something similar.
Good concept though and solid implementation! Well done.