diff --git a/main.lua b/main.lua
index 4f987f6..77950b8 100644
--- a/main.lua
+++ b/main.lua
@@ -169,7 +169,7 @@ function main_scene(do_backdrop)
                 local node = am.translate(hex_to_pixel(vec2(i, j), vec2(HEX_SIZE)))
                             ^ am.circle(vec2(0), HEX_SIZE, vec4(0), 6)
 
-                node"circle":action(am.tween(1, { color = color }))
+                node"circle":action(am.tween(0.6, { color = color }))
 
                 hex_backdrop:append(node)
             end
diff --git a/src/game.lua b/src/game.lua
index d8bdec6..693a254 100644
--- a/src/game.lua
+++ b/src/game.lua
@@ -140,6 +140,10 @@ local function game_deserialize(json_string)
         end
     end
 
+    -- after we have re-constituted all of the towers and modified the map's elevations accordingly,
+    -- we should re-calc the flow-field
+    apply_flow_field(new_state.map, generate_flow_field(new_state.map, HEX_GRID_CENTER), new_state.world)
+
     for i,m in pairs(new_state.mobs) do
         if m then
             new_state.mobs[i] = mob_deserialize(m)