Small example of using the SparkFun MicroView library. Hardware: https://www.sparkfun.com/sparkfun-microview-oled-arduino-module.html

MicroViewBounce.ino

/******************************************************************************
MicroViewBounce.ino

This sketch uses the MicroView library.
******************************************************************************/
#include <MicroView.h>

MicroView m;

struct State {
  int8_t x;
  int8_t y;
  int8_t ax;
  int8_t ay;
  uint8_t f;
  bool m;
};
  
State s = { 
  .x = 5, 
  .y = 5,
  .ax = -1,
  .ay = 1,
  .f = 0,
  .m = true,
};
  
char buf[32];

void setup() {
  Serial.begin(9600);
  
  m.begin();
  m.clear(ALL);
}

void loop() {
	input();
  update();
  
  if (s.f % 2 == 0) draw();

  delay(16);
}

void input() {
  if (Serial.available() > 0) {
    char c = Serial.read();

    switch(c) {
      case ' ':
        s.m = !s.m;
        break;
      case 'w':
        s.ay -= 2; 
        break;
      case 's':
        s.ay += 2;
        break;
      case 'a':
        s.ax -= 2; 
        break;
      case 'd':
        s.ax += 2;
        break;
    }
  }
}


void update() {
  if (s.ax < 0) s.ax = -1;
  if (s.ax > 0) s.ax = 1;
  if (s.ay < 0) s.ay = -1;
  if (s.ay > 0) s.ay = 1;

  if (s.x < 1 || s.x > 63) s.ax = s.ax * -1;
  if (s.y < 1 || s.y > 47) s.ay = s.ay * -1;
 
  if (s.x < 0 || s.x > 64) s.x = 32;
  if (s.y < 0 || s.y > 48) s.y = 24;

  if (s.m) {
    s.x += s.ax;
    s.y += s.ay;
  
    sprintf(buf, "%02dx%02d", s.x, s.y);
  
    Serial.println(buf);
  }

  s.f += 1;
}


void draw() {
  m.clear(PAGE, ' ');
  m.setCursor(34,1);
  m.print(buf);
  m.circleFill(s.x, s.y, 6, BLACK, NORM);
  m.circle(s.x, s.y, 7, WHITE, NORM);
  m.circleFill(s.x, s.y, 3, WHITE, NORM);
  m.display();
}

Slightly expanded with two buttons wired up to Aduino pins 2 and 3.

/******************************************************************************
MicroViewBounce.ino

This sketch uses the MicroView library.
******************************************************************************/
#include <MicroView.h>

MicroView m;

struct State {
  int8_t x;
  int8_t y;
  int8_t ax;
  int8_t ay;
  uint8_t f;
  bool m;
  bool b1;
  bool b2;
};
  
State s = { 
  .x = 5, 
  .y = 5,
  .ax = -1,
  .ay = 1,
  .f = 0,
  .m = true,
  .b1 = false,
  .b2 = false,
};
  
char buf[32];

const int button1Pin = 2;
const int button2Pin = 3;

void setup() {
  Serial.begin(9600);
  
  pinMode(button1Pin, INPUT_PULLUP);
  pinMode(button2Pin, INPUT_PULLUP);

  m.begin();
  m.clear(ALL);
}

void loop() {
	input();
  update();
  
  if (s.f % 2 == 0) draw();

  delay(16);
}

void input() {
  s.b1 = !digitalRead(button1Pin);
  s.b2 = !digitalRead(button2Pin);
 
  if(s.b1) s.ax -= 2;
  if(s.b2) s.ax += 2;

  if (Serial.available() > 0) {
    char c = Serial.read();

    switch(c) {
      case ' ':
        s.m = !s.m;
        break;
      case 'w':
        s.ay -= 2; 
        break;
      case 's':
        s.ay += 2;
        break;
      case 'a':
        s.ax -= 2; 
        break;
      case 'd':
        s.ax += 2;
        break;
    }
  }
}

void update() {
  if (s.ax < 0) s.ax = -1;
  if (s.ax > 0) s.ax = 1;
  if (s.ay < 0) s.ay = -1;
  if (s.ay > 0) s.ay = 1;

  if (s.x < 1 || s.x > 63) s.ax = s.ax * -1;
  if (s.y < 1 || s.y > 47) s.ay = s.ay * -1;
 
  if (s.x < 0 || s.x > 64) s.x = 32;
  if (s.y < 0 || s.y > 48) s.y = 24;

  if (s.m) {
    s.x += s.ax;
    s.y += s.ay;
  
    sprintf(buf, "%02dx%02d", s.x, s.y);
  
    Serial.println(buf);
  }

  s.f += 1;
}

void draw() {
  m.clear(PAGE, ' ');
  m.setCursor(34,1);
  m.print(buf);
  m.circleFill(s.x, s.y, 6, BLACK, NORM);
  m.circle(s.x, s.y, 7, WHITE, NORM);
  m.circleFill(s.x, s.y, 3, WHITE, NORM);
  
  if (s.b1) m.circle(s.x, s.y, 12, WHITE, NORM);
  if (s.b2) m.circle(s.x, s.y, 16, WHITE, NORM);
  
  m.display();
}