The source code to VVVVVV! http://thelettervsixtim.es/
Why do you think that https://github.com/OpenTTD/OpenTTD is a good alternative to VVVVVV
The source code to VVVVVV! http://thelettervsixtim.es/
Why do you think that https://github.com/OpenTTD/OpenTTD is a good alternative to VVVVVV