diff --git a/src/player.rs b/src/player.rs
index e5654d7..4c053bf 100644
--- a/src/player.rs
+++ b/src/player.rs
@@ -1,6 +1,7 @@
 use bevy::{
     prelude::*,
     sprite::{MaterialMesh2dBundle, Mesh2dHandle},
+    utils::{HashMap, HashSet},
 };
 use bevy_rapier2d::prelude::*;
 
@@ -46,19 +47,17 @@ pub fn player_ground_collision(
     mut collision_events: EventReader<CollisionEvent>,
 ) {
     let (p, mut player) = player.single_mut();
+    let scene_objs = scene_objs.iter().collect::<HashSet<_>>();
+
     for collision_event in collision_events.read() {
         match collision_event {
             CollisionEvent::Started(e1, e2, _) => {
-                if (e1 == &p && scene_objs.iter().any(|obj| *e2 == obj))
-                    || (e2 == &p && scene_objs.iter().any(|obj| *e1 == obj))
-                {
+                if (e1 == &p && scene_objs.contains(e2)) || (e2 == &p && scene_objs.contains(e1)) {
                     player.grounded = true;
                 }
             }
             CollisionEvent::Stopped(e1, e2, _) => {
-                if (e1 == &p && scene_objs.iter().any(|obj| *e2 == obj))
-                    || (e2 == &p && scene_objs.iter().any(|obj| *e1 == obj))
-                {
+                if (e1 == &p && scene_objs.contains(e2)) || (e2 == &p && scene_objs.contains(e1)) {
                     player.grounded = false;
                 }
             }
@@ -91,7 +90,7 @@ pub fn move_player(
 
         if kb_input.pressed(KeyCode::KeyW) && player.grounded {
             moved = true;
-            *vel = Velocity::linear(Vec2::new(0.,  9. * METER));
+            *vel = Velocity::linear(Vec2::new(0., 9. * METER));
             // *vel = Velocity::linear(Vec2::new(0., 9.81 * METER));
         }