Although the size of the game will always be limited to the device there are some things that can be done to help make the most of limited screen size. Try playing the game in Landscape mode to give you a wider table.
Also go into our settings under the visual style section and select "Customize Card Faces" to choose the largest and boldest font size. You can also try finding good contrasting colors for the card backs and background to help make everything stand out better in game.
Please let me know if you have any additional questions about these settings.