I had a fiddle with the demo .. better now :)
update: Working on a front end menu to select the resolution
//ULTLORES
// #define GRIDX 30
// #define GRIDY 20
// #define CELLXY 4

    //       LORES
    //      #define GRIDX = 60
   //       #define GRIDY = 40
   //       #define CELLXY = 2
    
      //HIRES
  //    #define GRIDX 120
   //   #define GRIDY 80
//     #define CELLXY 1 

https://github.com/Mystereon/Little-Bits