serial 'a' (STARFIELD) shift +10

src/mode/Pong/Pong.h

@@ -43,7 +43,6 @@ public:
 protected:
 
     void tick(uint8_t index, milliseconds_t milliseconds) override {
-      Serial.printf("tick(%lu)\n", milliseconds);
       switch (status) {
         case SCORE:
           timeout -= milliseconds;

src/serial.cpp

@@ -26,7 +26,7 @@ void serial_loop() {
         setMode((ModeId) (input - '0'));
         break;
       case 'a':
-        setMode((ModeId) (input - 'a'));
+        setMode((ModeId) (input - 'a' + 10));
         break;
       case '+':
         setBrightness(display.getBrightness() + 10);