After almost 5 months of searching for this game, I finally found it by chance.
It was a very beautiful game, the level of the challenge is great how to walk forward and shoot over the shoulder towards the back.
What really saddens me is that my younger brother (the designer of this game) passed away on 08/23/2021. He was very young (1994-2021).
In fact, until this moment, I still did not realize that he had left this world.