I enjoyed this quite a bit. I ended up re-implementing the game in Unity to automate all the marker management and scoring. The various interactions seem well thought out, and I like the personality implications: Momoyo's working hard and just cares about her company, Chimata cares about the fairness of the market, and Tsukasa is a manipulative hooligan who isn't annoyed by anything.
Got a score on normal of 2004