I came across a Flappy Bird website a while ago. It seemed to be a good DIY project to make for families and friends.
A simple game, but fun especially for little kids.
 
I prototyped it with our SmallPICO board, it worked, but the final package was too thick using the SmallPICO. 
So I customized a board to reduce the size. The new size is 1.47" x 1.1" x 0.5".
It's one of the smallest video game consoles based on the ESP32. Small enough to be put into my wallet.
 
Since then, I found another Flappy Bird at instructable.com, the code are the same. If one site is down you can get the code on the other one.
I don't know which one is the original creator.

 

Flappy Bird operation notes

  1. 1.  The reset button is under the display. You can press the display to reset the board in case the display is not working.
        A little kid could accidentally push it during playing, so it would end the game playing prematurely.

  3. 2.  The battery is rated at 200mA, it can last more than 2 hours of game playing time before it needs to be re-charged through the
        USB connector next to the buzzer. When you plug in or pull out the USB cable, don't pry it up. Keep it horizontally as much as possible.
        If the USB connector comes off it may rip off some traces on the Printed Circuit Board and it will be very hard to repair it.

  5. 3.  The red shunt plug is the on/off switch for the buzzer.  You can remove the red shunt plug, so it won't disturb other people nearby.
        In order to prevent losing it, it can be plugged into one pin instead of 2 pins. Or you can use your left thumb to quiet the buzzer
        while     using your right thumb to play.

  7. 4.  The SPDT slide switch near the left corner is the power switch for the battery.
        When it's slid up the battery is turned on. In order to charge the battery, the battery must be turned on.
        When you stop to play, you can slide it down to turn off the battery.

  9. 5.  The red LED between the USB connector and the buzzer is the USB power indicator. 
        Whenever a USB cable     is plugged in, this red LED will be lit.  When the side switch is slid up, a green LED will be on.
        It's the charging status LED.     When the battery is fully charged, the green LED will go off.

 
 
           
       
  Both top and bottom views  

Prototyped with a smallPICO board

  

 

    Video Clip