diff --git a/main.cpp b/main.cpp
index 0554aaa..0b65279 100644
--- a/main.cpp
+++ b/main.cpp
@@ -31,16 +31,15 @@ Player player = {
         .height = player_width,
     },
     .lives = 3,
+    .speed = 5.0,
+    .invulnerability_secs = 1,
     .last_hit = -10,
     .tear_speed = 10,
     .tear_range = 300,
     .tear_radius = 10.0f,
     .last_fired = 0,
     .fire_rate = .5,
-
 };
-auto player_speed = 5.0f;
-auto player_invulnerability = 1.0f;
 
 uint32_t score;
 
@@ -56,28 +55,26 @@ Vector2 Player::center() const noexcept {
 }
 
 bool Player::is_invulnerable(const double now) const noexcept {
-    return now < this->last_hit + player_invulnerability;
+    return now < last_hit + invulnerability_secs;
 }
 
-void Player::move(const float delta_x, const float delta_y) {
-    const auto x = std::min(
-        std::max(this->rect.x + delta_x, 0.0f),
-        level_right - this->rect.width);
-
-    const auto y = std::min(
-        std::max(this->rect.y + delta_y, 0.0f),
-        level_bottom - this->rect.height);
+void Player::move(const Vector2 delta) {
+    const auto [next_x, next_y] = Vector2Clamp(
+        Vector2Add({this->rect.x, this->rect.y}, delta),
+        {level_left, level_top},
+        Vector2Subtract({level_right, level_bottom}, {this->rect.width, this->rect.height})
+    );
 
     bool collided = false;
-    const Rectangle next_position = {
-        .x = x,
-        .y = y,
+    const Rectangle next_rect = {
+        .x = next_x,
+        .y = next_y,
         .width = this->rect.width,
         .height = this->rect.height
     };
 
     for (const auto wall: walls) {
-        if (CheckCollisionRecs(wall, next_position)) {
+        if (CheckCollisionRecs(wall, next_rect)) {
             collided = true;
             break;
         }
@@ -85,8 +82,8 @@ void Player::move(const float delta_x, const float delta_y) {
 
     if (collided) {
     } else {
-        this->rect.x = x;
-        this->rect.y = y;
+        this->rect.x = next_x;
+        this->rect.y = next_y;
     }
 }
 
@@ -220,9 +217,10 @@ int main() {
     std::string item_pickup_text_buffer;
     item_pickup_text_buffer.reserve(64);
     double item_last_picked_up = 0;
-    double item_pickup_message_duration = 3;
 
     while (!WindowShouldClose()) {
+        constexpr double item_pickup_message_duration = 3;
+        float dt_secs = GetFrameTime();
         if (IsWindowResized()) {
             screen_height = static_cast<float>(GetScreenHeight());
             screen_width = static_cast<float>(GetScreenWidth());
@@ -236,11 +234,11 @@ int main() {
 
 
         Vector2 delta{};
-        if (IsKeyDown(KEY_W)) delta.y -= player_speed;
-        if (IsKeyDown(KEY_S)) delta.y += player_speed;
-        if (IsKeyDown(KEY_A)) delta.x -= player_speed;
-        if (IsKeyDown(KEY_D)) delta.x += player_speed;
-        player.move(delta.x, delta.y);
+        if (IsKeyDown(KEY_W)) delta.y -= player.speed;
+        if (IsKeyDown(KEY_S)) delta.y += player.speed;
+        if (IsKeyDown(KEY_A)) delta.x -= player.speed;
+        if (IsKeyDown(KEY_D)) delta.x += player.speed;
+        player.move(delta);
 
 
         std::optional<Direction> tear_direction;
@@ -291,7 +289,7 @@ int main() {
                 }
 
                 if (CheckCollisionCircleRec(enemy.center, enemy.radius, player.rect) &&
-                    player.last_hit + player_invulnerability < now) {
+                    player.last_hit + player.invulnerability_secs < now) {
                     player.lives--;
                     player.last_hit = now;
                 }
diff --git a/types.h b/types.h
index 0d50293..e623f39 100644
--- a/types.h
+++ b/types.h
@@ -11,6 +11,8 @@
 struct Player {
     Rectangle rect;
     uint8_t lives;
+    float speed;
+    float invulnerability_secs;
     double last_hit;
     float tear_speed;
     float tear_range;
@@ -22,7 +24,7 @@ struct Player {
 
     [[nodiscard]] bool is_invulnerable(double now) const noexcept;
 
-    void move(float delta_x, float delta_y);
+    void move(Vector2 delta);
 };
 
 enum Direction {