Try spatious 4x4 layout

Author: rejunity

info.yaml

@@ -8,7 +8,7 @@ project:
   clock_hz:     25175000 # Clock frequency in Hz
 
   # How many tiles your design occupies? A single tile is about 167x108 uM.
-  tiles: "6x2"          # Valid values: 1x1, 1x2, 2x2, 3x2, 4x2, 6x2 or 8x2
+  tiles: "4x4"          # Valid values: 1x1, 1x2, 2x2, 3x2, 4x2, 6x2 or 8x2
 
   # Your top module name must start with "tt_um_". Make it unique by including your github username:
   top_module:  "tt_um_rejunity_atari2600"