Honeslty. I can't easily think of a way to use the newest episode for the game. It almost has potential, but mostly it's just...Ok. Only thing I could maybe think of/a way to spin it potentailly, is to maybe have it so Night/Dream Summer is more open about her attraction to Morty/Embraces it, rather than trying to deny it like Normal Summer does and is more than happy to do sexual stuff with him, espically with his new abs.
So could use that and have her be more 'I'm at least honest about my feelings and what I want.'
I know it's flimsy. Alternatvily could change around the sleep scenes with Summer and Beth to have an option for normal sleep scenes or with their night selves who are as said more open to doingstuff with Morty and admitting they actually like him romantically.
As going by the after episode commentary, Night/Dream Summer is her being fuled by her deep seated resentment of Rick. Could simply expand on that a bit to be more that the dream/night versions are them being more honest and the like about themsleves and what they feel/want.
Best idea ive got at least.