Fix blue button realesing

main/knobs.c

@@ -160,7 +160,6 @@ void handle_shoot_button(uint32_t knob_states, int* button_b_pressed, player_t*
       (*num_projectiles)++;
 
       float used_ammo = (float)(player->max_ammo - player->ammo) / 100 * 32;
-      printf("ammo %u\n", player->ammo);
 
       set_ammo_count(spiled_base, (int)used_ammo);
       *button_b_pressed = 1;
@@ -177,7 +176,7 @@ void handle_button_released(uint32_t knob_states, int* button_r_pressed, int* bu
     *button_g_pressed = 0;
   }
 
-  if ((knob_states & (1 << 19)) == 0) {
+  if ((knob_states & (1 << 18)) == 0) {
     *button_b_pressed = 0;
   }
 }
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