The can be rather demanding when it comes to performance, especially on older devices. This is mainly caused by the device's RAM, so if you encounter performance issues please try the following before starting the game as a temporary fix:
- Restart your device
- Turn off your WiFi and mobile data
- Shut down any unnecessary apps running in the background
These actions will reduce the load on your phone/tablet and might help certain devices squeeze out just enough extra power to run the game properly.