update handling of Lua assets

Sample/Lua/example.lua

@@ -0,0 +1,21 @@
+local dir = true
+local minY = -300
+local maxY = -25
+
+function doSomething(first, other)
+    local pos = first.position
+
+    if dir then
+        pos.y = pos.y + 10
+        if pos.y >= maxY then
+            dir = false
+        end
+    else
+        pos.y = pos.y - 10
+        if pos.y <= minY then
+            dir = true
+        end
+    end
+
+    first.position = pos
+end