diff --git a/html/images/space.svg b/html/images/space.svg
index 696a2e1..6090f26 100644
--- a/html/images/space.svg
+++ b/html/images/space.svg
@@ -74,12 +74,12 @@
   </g>
 
   <!-- <polygon class="wall" points="20,20 40,20 40,40 20,40" /> -->
-  <polygon class="wall" points="-10,-30 -10,-40 30,-50 60,-30 80,0 150,0 150,10 60,50 -10,40 -20,20 20,20 20,-20" />
+  <!-- <polygon class="wall" points="-10,-30 -10,-40 30,-50 60,-30 80,0 150,0 150,10 60,50 -10,40 -20,20 20,20 20,-20" /> -->
   <!-- <polygon class="wall" points="-130,-80 -40,-70 -70,-10 -100,40 -120,100" /> -->
-  <!-- <g> -->
-  <!--   <polygon class="wall" points="-130,-80 -40,-70 -70,-10" /> -->
-  <!--   <polygon class="wall" points="50,70 90,-10 130,70" /> -->
-  <!-- </g> -->
+  <g>
+    <polygon class="wall" points="-130,-80 -40,-70 -70,-10" />
+    <polygon class="wall" points="50,70 90,-10 130,70" />
+  </g>
 
   <g id="triangles"></g>
   <g id="edges"></g>
@@ -360,8 +360,8 @@
       return hc <= shipRadius;
     }
 
-    function detectCornerCollision([xc, yc], pts) {
-      return pts.some(([x, y]) => {
+    function detectCornerCollision([xc, yc], corners) {
+      return corners.some(([x, y]) => {
         cornerPt.x = x - xc;
         cornerPt.y = y - yc;
 
@@ -369,9 +369,9 @@
       });
     }
 
-    function detectCollisions(position, corners, edges) {
+    function detectCollisions(position, walls, edges) {
       return [
-        [corners, corner => detectCornerCollision(position, corner)],
+        [walls, wall => detectCornerCollision(position, wall)],
         [edges, edge => detectEdgeCollision(position, edge)]
       ].some(([t, f]) => t.some(f))
     }