The purpose of this project is to learn how to program for UEFI and to show it is not that hard. Here is a screenshot from the game running:
To compile this project, you need EDK II, follow the instructions given on their official documentation page which can be find here: https://github.com/tianocore/tianocore.github.io/wiki/Getting-Started-with-EDK-II
After compiling, rename the generated Pong.efi to BOOTX64.EFI (or BOOTIA64.EFI or BOOTARM.EFI, depending on the target) and put it on a FAT16 or FAT32 USB key in the path:
/EFI/BOOT/BOOTX64.EFI
s / x : Control left bat Up / Down : Control right bat