Theme parks have many different areas to work in. The main ones are rides, retail, catering and maintenance. If you worked in the rides section then you would be responsible for operating the rides and making sure that guests embark and disembark the rides safely, and also that the guests adhere to any rules (such as height limitations and other safety regulations).
The retail section would involve working in different shops within the park, such as gift shops, food shops, costume shops etc. Catering would involve serving food and drinks to guests, taking their orders, keeping the area clean etc. The maintenance section would involve repairing rides and checking that the rides are running safely.
Both the rides and maintenance sections can be quite hectic, particularly with extremely busy theme parks such as Alton Towers. There are also park cleaners, who make sure that the park is kept tidy, toilets kept clean etc.
The retail section would involve working in different shops within the park, such as gift shops, food shops, costume shops etc. Catering would involve serving food and drinks to guests, taking their orders, keeping the area clean etc. The maintenance section would involve repairing rides and checking that the rides are running safely.
Both the rides and maintenance sections can be quite hectic, particularly with extremely busy theme parks such as Alton Towers. There are also park cleaners, who make sure that the park is kept tidy, toilets kept clean etc.