No Skins: Hide all images/skins from cells.
No Names: Hide all names from cells.
No Colors: All cells and foods be white color.
Dark Theme: Use dark color background instead of white.
Show Mass: Mass of your cell. Appear on center of cell.
Smooth Render: Play with more smoother graphics.
Hide Chat: Hide chat panel from screen.
If you cannot connect to the servers, check if you have some anti virus or firewall blocking the connection.