Split bullet spawning and bouncing/penetration

src/Dodge/Placement/Instance/Wall.hs

@@ -87,6 +87,7 @@ baseBlockPane = defaultWall
     , _wlOpacity = Opaque
     , _wlUnshadowed = True
     , _wlFireThrough = True
+    , _wlPenetrable  = True
     }
 -- TODO find home for this
 {- Replaces instances of a given 'PutID' with 'PSType's drawn from a list.  -}