anaytics

src/game/persistence.ts

@@ -29,6 +29,9 @@ export interface SaveData {
   /** Cumulative coins earned from converting resources — unlike inventory.coins, this never goes
    * down when coins are spent on upgrades. */
   totalCoinsEarned?: number;
+  /** Real seconds elapsed this life (ticked deltaTime, not in-game clock time) — stops
+   * accumulating once dead, same as the other life stats above. */
+  playTimeSeconds?: number;
 }
 
 function isValidSave(value: unknown): value is SaveData {