They are magical with magical stomachs^^
Yeah someone else reported this bug it's when you change the number of rows with the buttons on the left while answering a request. I'm fixing it and the update will be online very soon.
About timers and penalties, we think about it but we decided to go for with an easy unlimited mode :)
If the game evolves, I would keep it the current as the "endless mode" and add a "normal mode" with time limits, 3 errors max and a number of orders to answer.