🍰 My Little Bakery
You run a little bakery with a two-shelf display case of six priced cakes. A customer walks up and orders; you tap cakes into the packing tray and add up the bill, or take the customer's big note and gather notes from the till to give the right change. Vietnamese banknotes are drawn in their real colours with big numbers, and prices use Vietnamese formatting. A wrong answer only makes the counter wobble: the shop counts up thousand by thousand the way real sellers do, and five happy customers in a row earn a star.
In Pack and total, tap cakes in the display case to put them in the tray exactly as the customer asked, tap a cake in the tray to put it back if you packed too many, then pick the right total among four choices. In Give change, the customer pays with a 20,000 or 50,000 note: tap notes in the till to gather the exact change, tap a note on the counter to take it back, then press Return to customer. A wrong answer only wobbles, the shop counts up thousand by thousand as a hint, and five happy customers in a row earn a star.