Fun with the Digispark Pro "Beta Supporters" Shield. Uses everything on the board!

BetaBoard

#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#include <LedControl.h>

#define JOYX A5
#define JOYY A8
#define BUTTON 1
#define LIGHT A9

LedControl lc = LedControl(10,11,12,1);

void setup() {
  lc.shutdown(0, false);
  lc.setIntensity(0, 8);
  lc.clearDisplay(0);
  
  pinMode(JOYX, INPUT);
  pinMode(JOYY, INPUT);
  pinMode(BUTTON, INPUT);
  pinMode(LIGHT, INPUT);
}

void loop() {
  lc.setIntensity(0, map(analogRead(LIGHT), 0, 1024, 0, 15));
  lc.clearDisplay(0);
  if(!digitalRead(BUTTON)) {
    for(int x = 0; x < 8; x++) {
      for(int y = 0; y < 8; y++) {
        lc.setLed(0, x, y, true);
      }
    }
    delay(10);
    return;
  }
  
  long xint = analogRead(JOYX);
  long yint = analogRead(JOYY);
  
  long x = map(xint, 0, 1023, 15, 0);
  long y = map(yint, 0, 1023, 15, 0);
  
  if(x % 2 == 1) {
    lc.setLed(0, (x / 2) + 1, y/2, true);
  }
  if(y % 2 == 1) {
    lc.setLed(0, x/2, (y / 2) + 1, true);
  }
  if(x % 2 == 1 && y % 2 == 1) {
    lc.setLed(0, (x / 2) + 1, (y / 2) + 1, true);
  }
  
  lc.setLed(0, x/2, y/2, true);
  delay(10);
}