This felt really great to play. One thing this game does very well is to give the player a strong sense of agency for their risk/reward evaluations. Just like the classic Yahtzee, every roll is an important decision. The biscuit mechanics also fit together really well. Use biscuits to boost your score -> Beat the challenge scores and get rewarded with more biscuits -> Use fewer biscuits to carry them over. There is a nice tension keeping the player in the drivers seat in deciding when to allocate resources. The changing scoring patterns for each game keep things fresh. I imagine there will be a clear, correct choice (in the expected returns sense) for where to stack the cookies, however. Even with this simplification, decisions about how much to spend and which rerolls to take remain critically important. Again, this game does a great job at giving the player agency in the face of random outcomes.
This was a lot of fun. Great work!