Very bad try at doing a flappy bird clone. I can't even see the pipes that i have to avoid.

Nostalgia.

But I don't understand why I'm dying even when I don't hit a wall... And the game doesn't quite meet the limitation. :/

monochrome flappy bird yes

I actually like the black and white graphics, it gives Flappy Bird a different retro feel. But I don’t see how the limitation “you are your own enemy” is used in this game.

Black and white flappy bird that barely works.