I had the disagreeable experience of watching my partner, a bi man, try out this game to see if it'd be a thing he was interested in. This is going to be mostly his thoughts, since he has trouble structuring them into the format of a full review, so I am merely the messenger here.
The Writing:
SpaceCorps is an intensely frustrating experience. It is at once claiming to be bisexual, while every avenue of the opening is steeped in... honestly really vile double standards around whether or not the protagonist is interested in men. You are constantly bombarded with 'are you sure?' whenever anything remotely homoerotic comes up (phrased in really demeaning, borderline homophobic language), and when you combine that with the protagonist's internalized homophobia, and the way characters constantly shove M/F interactions in your face, it's really offputting. It's like gay options are very much separate, bolted on, to an implicitly straight narrative, and frankly, that's gross.
I find the amount of people screaming about the gay in this game to be wild, given the idea that the lack of choice or customizability or just... ability to self-actualize in this narrative might be just as unpleasant from the gay side never seems to have occurred to them. (I mean, why would it?) If you wanted Male on Male interactions, this game actively forces you to experience heterosexual ones on a nearly constant basis, so if anything it's worse from the other side of things, because we know you guys were offered multiple ways out, but you're almost never offered the opportunity to avoid M/F scenes.
Those MF scenes by the way? Things just happen to you and fuck you if you don't want that. This never happens with gay interactions, by the way, probably because the dev knew the straight boys would actually crucify him if he did that. It's genuinely repulsive writing, before one even gets to the constant casual use of slurs and the 'humor'. You might say 'hey, it's a starship troopers fanfic, ofc there are slurs!' but that just brings up another problem with the writing.
The tone. This game switches from juvenile twelve year old 'poop and f*gs' humor to quite dark rapey content to characters being just plain creepy in ways the writer seems unaware of. Degrees of Lewdity this is not. The dark tone is not established beforehand, and at no point can you lay out what fetishes/kinks/sexuality you are comfortable with. My partner literally spent a couple of minutes trying to work out how to use the psychometry menu to customize the content in this game like one would in DoL for example, only to find it literally does not work that way and you just get whatever bullshit the dev wanted to throw at you.
This game does not respect your boundaries at all. Any choice is an illusion, and the lines you use to pick those un-choices are written by the kind of twelve year old who would squeak slurs at the entire lobby in Battlefield. Your choices as a player don't matter, and the MC is characterized in such an overbearingly toxic way between choices that it wouldn't matter much if they did. The 'make better choices' end screen is just insult to injury at that point.
As of time of writing, he just found a minigame about stripping women in the shower, and he's actively like 'I don't want to do this, fuck this game', but the game is designed to force you to do things like this, and it didn't have to be designed to railroad you into these creepy interactions. The protagonist is constantly like 'Urgh, the women are so hot over there, showering, minding their own business, fucking bitches' but it's like the men in the room are a complete afterthought. Being in this MC's head is like viewing the F95zone comments section on a gay game 24/7.
Scenes He Liked:
My partner's one bright point in this game, when we talked about it, was probably the psychic fox guy. The writing during his early scene was pretty much the one time neither of us felt the game was being implicitly hostile to my partner for... not wanting to ogle women, or 'make his move' on 'his' woman, or be a constantly jealous, macho, xenophobic piece of shit. It was a moment where the writer put down the pen, and God took over for a moment. The MC's infantilizing, whiny, straight boy commentary faded away for a second, and it was glorious, but it was over all too quickly.
Graphics:
The renders are generally quite good, with the exception of whenever the models open their mouths, in which they leapfrog a segment of the uncanny valley from 'acceptably cute humanoid' into 'grinning corpse-demon'. The posing and shot composition was fine. He said the shot of the MC unveiling his cock was the closest to eroticism he'd seen in the game thus far, because confident masculinity is pretty gay, and everything else had been mostly mincing stereotype stuff.
He hated the animations. They're stuttery and jarring, and actively ruin any eroticism of a scene that survived words like 'ding a ling' and the constant, pervasive, dick-wilting homophobia. His words on the matter were, I quote: 'these models are so good, just show me a CG or something? Please, why do we have to constantly 'are you sure' me when I'm looking at a guy's dick!? I've already selected to do that, just leave me alone!'
Conclusion
Not the bisexual nirvana we've both seen it suggested to be on this site. Would not recommend at all. There's nothing queer about this game. When trying to play a bi man, it doesn't question any of the conventions of masculinity one would expect of a non-straight character. In many cases, it pretty much just uses the 50s 'Fairy' stereotype straight-faced. My own observation was that it's like if the dev of Dreams of Desire tried to write a bisexual game, while remaining just as terrible at writing erotica, and stepping up the insecure masculinity roughly 1000%. It could never hope to match even a fraction of the wit, charm, eroticism or satire of the Starship Troopers movie.