feat: add ability to move piece with arrow keys

config.yaml

@@ -3,16 +3,15 @@ window:
   height: 600
   icon: "img/tetris_icon.png"
   title: "Tetris"
+  bg-color: "#6495ED" # cornflower-blue
   
 engine:
   fps: 60
   tile-size: 20
 
 # https://coolors.co/6495ed-ee6352-59cd90-fac05e-dfd9e2
-# TODO change config color names, should be generic
 color:
-  cornflower-blue: "#6495ED"
-  fire-opal: "#EE6352"
-  emerald: "#59CD90"
-  maximum-yellow-red: "#59CD90"
-  languid-lavender: "#DFD9E2"
+  base-1: "#EE6352"
+  base-2: "#59CD90"
+  base-3: "#59CD90"
+  border: "#DFD9E2"