Uh out of morbid curiosity does anyone know that game Nayuta is talking about?

I was assuming it meant Umamusume.

Translateee said in comment #2592560:

I was assuming it meant Umamusume.

Actually, there's another game that's been viral on the streamers lines. its a weird flash like game (yea i know flash is dead, but i don't know what else to call it) that has horrible graphics, you breed horses, you extract their DNA to make better horses, then you race, then you do it all over again.

The weird thing about it is that you aren't restricted to just breeding horses, the game lets you do crazy stuff like breeding humans, humans with horses, the truck with a horse, human with a truck, with other inanimate objects, and you get some weird centaur monstrosity, its pretty crazy.

Found it, its called "Horsey game"