Feminine males are allowed as they're identified as male.
Futanari or intersex is dependant on how the character identifies and/or chooses to present themselves. E.g. if they use she/her pronouns and are primarily female identifying then no.
As long as the game as a whole isn't offensive or derogatory. And if it's going to be NSFW please make sure to label it is such and include any content warnings.
