diff --git a/semestralka1/src/game/game_state.h b/semestralka1/src/game/game_state.h
index 37b78fe..c0bd079 100644
--- a/semestralka1/src/game/game_state.h
+++ b/semestralka1/src/game/game_state.h
@@ -23,6 +23,7 @@ struct GameState {
     
     int background_shift;
     
+    int current_speed;
     ObstacleRenderData obstacles[MAX_RENDER_OBSTACLES];
     
     bool game_over;
diff --git a/semestralka1/src/game/state.cpp b/semestralka1/src/game/state.cpp
index 300fbde..ed5e5ba 100644
--- a/semestralka1/src/game/state.cpp
+++ b/semestralka1/src/game/state.cpp
@@ -120,16 +120,6 @@ void MovementState::set_state(PlayerState s) {
   current_state = s;
 }
 
-void MovementState::set_motion_state_for_speed(int player_speed, int ground_speed) {
-    int relative = player_speed - ground_speed;
-    PlayerState new_state = (relative > 1) ? PlayerState::Run : PlayerState::Walk;
-    if (new_state != current_state) {
-        run_index = 0;
-        walk_index = 0;
-    }
-    current_state = new_state;
-}
-
 void MovementState::toggle_walk_frame(float player_speed, int tick_counter) {
   switch (current_state) {
   case PlayerState::Run:
diff --git a/semestralka1/src/game/state.h b/semestralka1/src/game/state.h
index 9978c77..29d53b8 100644
--- a/semestralka1/src/game/state.h
+++ b/semestralka1/src/game/state.h
@@ -27,7 +27,6 @@ public:
   void update();
   void start_crawl(PlayerState crawl_type);
 
-  void set_motion_state_for_speed(int player_speed, int ground_speed);
   void toggle_walk_frame(float player_speed, int tick_counter);
 
   FrameSelection get_frame_selection() const;
diff --git a/semestralka1/src/main.cpp b/semestralka1/src/main.cpp
index 98f6b25..2e0b860 100644
--- a/semestralka1/src/main.cpp
+++ b/semestralka1/src/main.cpp
@@ -21,5 +21,5 @@ int main(void) {
     serial_port.set_format(8, BufferedSerial::None, 1);
     printf("Baud: %d, Format: 8-N-1\r\n", BAUD_RATE);
 
-    render_loop(2);
+    render_loop(1);
 }
diff --git a/semestralka1/src/render/loop.cpp b/semestralka1/src/render/loop.cpp
index 6bdf4b1..261dc33 100644
--- a/semestralka1/src/render/loop.cpp
+++ b/semestralka1/src/render/loop.cpp
@@ -37,29 +37,39 @@ void logic_loop(void *arg) {
   timing.set_ground_speed(speed);
 
   CharacterPosition pos = {PLAYER_X, PLAYER_Y};
-  if (speed < 3)
-    player_state.set_state(PlayerState::Run);
-  else
-    player_state.set_state(PlayerState::Walk);
 
   Timer spawn_timer;
   spawn_timer.start();
+  Timer speed_timer;
+  speed_timer.start();
 
   int anim_tick_counter = 0;
   int tick_counter = 0;
   bool game_over = false;
 
   // Spawn first obstacle
-  spawn_obstacle(CrawlObstacleType::Crawl1, VIEW_WIDTH + 10);
+  if (speed >= 5)
+    spawn_obstacle(CrawlObstacleType::Crawl1, VIEW_WIDTH + 10);
 
   while (!game_over) {
     tick_counter++;
 
+    if (speed_timer.elapsed_time() >= 6s) {
+      speed++;
+      timing.set_ground_speed(speed);
+      speed_timer.reset();
+
+      // update player's animation mode
+      if (speed < 4)
+        player_state.set_state(PlayerState::Walk);
+      else
+        player_state.set_state(PlayerState::Run);
+    }
     mover.update_position(speed, timing.get_ground_speed());
     pos.x = mover.get_position();
 
     // Spawn periodically
-    if (spawn_timer.elapsed_time() > 5s) {
+    if (speed >= 5 && spawn_timer.elapsed_time() > 6s) {
       spawn_timer.reset();
       spawn_obstacle(CrawlObstacleType::Crawl1, VIEW_WIDTH);
     }
@@ -90,8 +100,7 @@ void logic_loop(void *arg) {
 
       player_state.toggle_walk_frame(speed, anim_tick_counter);
       FrameSelection frame = player_state.get_frame_selection();
-      CharacterPosition draw_pos =
-          get_aligned_frame_position(pos, frame.movement, frame.frame_index);
+      CharacterPosition draw_pos = get_aligned_frame_position(pos, frame.movement, frame.frame_index);
 
       // check collision
       bool collision = false;
@@ -106,6 +115,7 @@ void logic_loop(void *arg) {
       g_state_mutex.lock();
 
       g_state.player_pos = draw_pos;
+      g_state.current_speed = speed;
       g_state.movement = frame.movement;
       g_state.frame_index = frame.frame_index;
       g_state.background_shift = animation.get_shift();
@@ -153,10 +163,12 @@ void render_loop_thread() {
       draw_mask("background", local.background_shift);
       draw_character(local.player_pos.x, local.player_pos.y, local.movement,
                      local.frame_index);
-      for (int i = 0; i < MAX_RENDER_OBSTACLES; i++) {
-        if (local.obstacles[i].active)
-          draw_obstacle(local.obstacles[i].x, local.obstacles[i].y,
-                        local.obstacles[i].type);
+      if (local.current_speed >= 5) {
+        for (int i = 0; i < MAX_RENDER_OBSTACLES; i++) {
+          if (local.obstacles[i].active)
+            draw_obstacle(local.obstacles[i].x, local.obstacles[i].y,
+                          local.obstacles[i].type);
+        }
       }
     }