diff --git a/main.cc b/main.cc
index a21d992..6822b2c 100644
--- a/main.cc
+++ b/main.cc
@@ -67,6 +67,7 @@ void game_init() {
 void game_destroy() {
     c_index_destroy();
     balls_destroy();
+    polygons_destroy();
 }
 
 static guint animation_timeout_id = 0;
diff --git a/polygons.cc b/polygons.cc
index 6e66eec..4256c36 100644
--- a/polygons.cc
+++ b/polygons.cc
@@ -277,13 +277,17 @@ void polygon::draw(cairo_t* cr) const {
     draw_circle(cr, centroid, 1);
 
     // draw speed
-    (10 * delta * this->speed).draw(cr, centroid);
+    (delta * this->speed).draw(cr, centroid);
 }
 
 void polygons_draw(cairo_t* cr) {
-    draw_circle(cr, col.impact_point, 3); // tbd
-    col.n.draw(cr, col.impact_point);     // tbd
+    // draw_circle(cr, col.impact_point, 3); // tbd
+    // col.n.draw(cr, col.impact_point);     // tbd
 
     for (const polygon* p = polygons; p != polygons + n_polygons; ++p)
         p->draw(cr);
 }
+
+void polygons_destroy() {
+    delete[] (polygons);
+}
diff --git a/polygons.h b/polygons.h
index 8ccb6ae..c09be75 100644
--- a/polygons.h
+++ b/polygons.h
@@ -114,5 +114,6 @@ extern uint n_polygons;
 extern void polygons_init_state();
 extern void polygons_update_state();
 extern void polygons_draw(cairo_t* cr);
+extern void polygons_destroy();
 
 #endif