A. If the pause button appears too small, try adjusting the display settings on your Android device. Go to 'Settings' > 'Display' > 'Display size' and increase the size to see if it affects the game's UI elements, including the pause button.
B. You can also try changing the screen resolution of your device. Go to 'Settings' > 'Display' > 'Screen resolution' and select a higher resolution to see if it makes the pause button more accessible.