I downloaded it and it was 34 bit, mine even entered but it hangs A LOT, it hangs so much that it even goes out
that's kinda sad :(
same for me, I can open the game but it lags a lot and then closes itself in less than a minute after opening it, I looked at the support channels and the nebula bug reports in the Gacha nebula discord server, it seems like every 32 bit user is having issues with Gacha nebula, all that we can do is wait for the update. (You can check if gacha nebula has been updated here or here)