The best restaurants serving American food in Aberystwyth Canol/Central Ceredigion Mid Wales

Went here for lunch hungry, ordered on the little screens and decided to pay with cash. Sat down and realised our order wasnt on the screen but just thought we got the wrong number. Sat there for 25 mins waiting then tried to order again. Waited there for another 5-10 mins then went to ask and apparently we had to pay at the desk before they prepared it when we thought we payed when we got the food. No insturctions at all, hope they will chamge it. Food was nice but employes annoyed and non sympathetic