diff --git a/gui.c b/gui.c
index a68cc36..3b846b3 100644
--- a/gui.c
+++ b/gui.c
@@ -8,6 +8,7 @@
 #include <time.h>
 #include "engine.h"
 #include "gui.h"
+#include "dispatcher.h"
 
 /* microui includes */
 #define MU_IMPLEMENTATION
@@ -68,9 +69,11 @@ static void gui_update(void)
         if (mu_button(ctx, active ? "Stop" : "Play")) {
             active = !active;
             if (active) {
-                engine_start(g_engine);
+                Action action = { .type = ACTION_TRANSPORT_PLAY };
+                g_engine->dispatch(action);
             } else {
-                engine_stop(g_engine);
+                Action action = { .type = ACTION_TRANSPORT_PAUSE };
+                g_engine->dispatch(action);
             }
         }
         if (mu_button(ctx, "Reset")) {
@@ -153,9 +156,11 @@ int gui_main(Engine *engine)
                 case ' ':
                     active = !active;
                     if (active) {
-                        engine_start(g_engine);
+                        Action action = { .type = ACTION_TRANSPORT_PLAY };
+                        g_engine->dispatch(action);
                     } else {
-                        engine_stop(g_engine);
+                        Action action = { .type = ACTION_TRANSPORT_PAUSE };
+                        g_engine->dispatch(action);
                     }
                     break;
                 case KEY_UP:
@@ -176,7 +181,8 @@ int gui_main(Engine *engine)
         }
 
         /* update engine state */
-        current_beat = g_engine->transport->bar_position * 4 + g_engine->transport->beat_position;
+        AppState state = dispatcher_get_state();
+        current_beat = state.bar_position * 4 + state.beat_position;
 
         /* render GUI */
         gui_update();