Resolutions!

You can now change fractal rendering resolution from the main menu.

The default is set to 1280x720, but if you can set the resolution to something lower (or higher) from in game.

This is available both on the web version and the desktop JAR file.  Keep in mind that the resolution of the fractal rendering and your screen resolution are independent.  This means your screen size can be 1920x1080, but the fractal rendering can be set to 1280x720 so that your GPU can handle 60fps or better.  

A ratio of 1:1 is always best if your GPU can handle it.