Rock Dodger (joystick) is a ready-made Basys 3 FPGA game written in Verilog. It uses PmodJSTK joystick, VGA. Play it free right in your browser - nothing to install, no FPGA board needed.
How to play
Steer the ship with the joystick (drag the stick on the card, or keys I J K L, or a USB game controller), dodge rocks, grab stars. Stick press (H) = shield. btnC starts.
What it uses
Verilog · PmodJSTK joystick, VGA
The code: download the Verilog project (.zip) — read it, change it, and run your version with the free PC program.