In the tradition of, "can it run" I present to you:
Flappy Bird for the Dual Vic hardware.
F.A.Q!) Is this a PC game made to look like like a Vic Dual?
No, this is an official Vic Dual game
2) Will it run on actual hardware?
Not sure, I don't own a Vic Dual but, I will be using the Carnival Rom set
3) Is it open source?
Yes
4) What tools did you use?
8bitworkshop