Mini Micro Mouse! ($15)

#include "Mouse.h"
#include "Keyboard.h"
#include <FastLED.h>

FASTLED_USING_NAMESPACE

#define Xpin A8
#define Ypin A9
#define Spin 7
#define LButton 16
#define RButton 14
#define LedPin 10
#define NUM_LEDS 1

#define LED_TYPE WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

#define BRIGHTNESS 100
#define FRAMES_PER_SECOND 120

int Hue;
int LeftButton;
int RightButton;
int JoyX;
int JoyY;

void setup() {

  FastLED.addLeds<LED_TYPE, LedPin, COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  // set master brightness control
  FastLED.setBrightness(BRIGHTNESS);

  pinMode(Xpin, INPUT);
  pinMode(Ypin, INPUT);
  pinMode(LButton, INPUT_PULLUP);
  pinMode(RButton, INPUT_PULLUP);
  pinMode(Spin, INPUT_PULLUP);

  Serial.begin(9600);
  Mouse.begin();
  Keyboard.begin();
  delay(1000);
}

void loop() {
  // put your main code here, to run repeatedly:


  LeftButton = digitalRead(LButton);
  RightButton = digitalRead(RButton);
  JoyX = map(analogRead(Xpin), 0, 1023, 3, -4);
  JoyY = map(analogRead(Ypin), 0, 1023, 4, -4);

  fill_rainbow(leds, NUM_LEDS, Hue, 7);
  EVERY_N_MILLISECONDS(15) {
    Hue++;
  }
  FastLED.show();

  Serial.print("X:");
  Serial.print(JoyX);
  Serial.print("  Y:");
  Serial.print(JoyY);
  Serial.print("  S:");
  Serial.print(digitalRead(Spin));
  Serial.print("  LeftButton:");
  Serial.print(LeftButton);
  Serial.print("  RightButton:");
  Serial.println(RightButton);


  if (LeftButton == 0 && digitalRead(Spin) == 1) {
    Mouse.press(MOUSE_LEFT);

  } else if (LeftButton == 0 && digitalRead(Spin) == 0) {
    Keyboard.press(218);
    delay(10);
  } else {
    Mouse.release(MOUSE_LEFT);
    Keyboard.releaseAll();
  }
  if (RightButton == 0 && digitalRead(Spin) == 1) {
    Mouse.press(MOUSE_RIGHT);
  } else if (RightButton == 0 && digitalRead(Spin) == 0) {
    Keyboard.press(217);
    delay(10);
  } else {
    Mouse.release(MOUSE_RIGHT);
    Keyboard.releaseAll();
  }

  Mouse.move(JoyX, JoyY);
}