Title demo as a showcase: doors, every trap, rune tower, rooms, mana spring, hero gate, spells

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/traps.rs

@@ -381,6 +381,15 @@ impl Game {
     }
 
     // armed traps go off when enemies come close
+    // the title demo: its armed traps count down and go off (there is no forge economy there)
+    pub(crate) fn demo_traps(&mut self, dt: f32) {
+        for t in self.traps.iter_mut() {
+            t.fired += dt;
+            t.cd -= dt;
+        }
+        self.update_traps(dt);
+    }
+
     fn update_traps(&mut self, dt: f32) {
         // poison clouds and rolling boulders
         for c in self.clouds.iter_mut() {