Good game but terrible artistic choices.
Regarding the piss/squirt debate in the reviews: she's absolutely just squirting, but I like to imagine she's pissing herself like some fatalpulse doujin. (or it might be piss either way since, no joke, there's not been enough scientific inquiry into the female orgasm to actually know what squirting is).
No, she is definitely pissing. In the X-rays, you can clearly see the bladder full of piss. This is also noticeable on his regular works, such as this one:
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and:
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Makes no sense for her to squirt after being defeated. She's pissing herself.