In the baking game I didn't felt the risk happening and I could maintain safely gains of x4 and x3 cookies. Didn't sense any strategy or risk to take.
In the 21 card game I didn't know how much more I was making when I win the game, not knowing the card pool and the card values making me not being able to understand the risks of buying one more card. One thing that was really confusing for me was that the A card some times is worth 1 and some times it is worth 11.