First Night of Summer is beautifully tender. The instrumentation, dynamics, mixing, are all simply breathtaking. I've not rated very many thus far, but this has been my favourite track of the entire jam BY FAR.
Gone, Searching, Reunited is deeply melancholic to begin with. I can imagine the string section (when the lovers reunite) coming at us towards the end of the game, but that one feels like it's missing a little something -- a hint of a higher octave for a more climactic finish, I think.
Now, with regards to whether this classes as a game OST. I strongly think it does, if not straight up cutscene material. It is only a minor nitpick for me to say "consider some loop points in the things you write" because looping game audio tracks that convey a lot emotionally, give us lots of highs and lows, are quite rare, and I want that cemented in people's minds that this can indeed happen. Right now the division between "film score" and "game audio" is kinda there in listeners' minds and to many, this screams "film score." Looping the audio after taking us on an absolute emotional rollercoaster like you have done would be the icing on the cake, if I'm being honest.
Well done, and all the best this jam!