1 files changed, 9 insertions, 2 deletions
diff --git a/src/world/cell.js b/src/world/cell.js
index 5783d72..6e013c6 100644
--- a/src/world/cell.js
+++ b/src/world/cell.js
@@ -29,13 +29,20 @@ export function cells_apply(cells, proposals) {
     (acc, prop) => {
       const change = (prop.world_updates || []).reduce(
         (acc_, update) => {
-          acc_[update.y][update.x].type = update.to;
+          const cell = acc_[update.y][update.x];
+          if (update.to) { cell.type = update.to; }
+          if (update.flags) {
+            cell.flags = cell.flags || {}
+            for (let k of Object.keys(update.flags)) {
+              cell.flags[k] = update.flags[k];
+            }
+          }
           return acc_
         },
         [...acc]
       );
       return change;
     },
-    [...cells]
+    [...cells].map(row => row.map(cell => ({ ...cell, flags: {}, })))
   );
 }