To take on the theme of the jam, the game mixes sci-fi and fantastical elements, which fit pretty well together, giving an eerie feel to Tsumugi environment and state of mind. Through the many early endings, the story pushes you to explore the strange happenstance.
At times, the game seems a tad unfinished and unpolished, which the author can be forgiven for, as it was completed in less than a day. There seems to be achievements and stats aspect in the game, which you are notified when picking certain choices. However, it is unclear how much this affect the story, aside from direct variation (or running into an abrupt ending).
There is something quite interesting to the setting, and how you get to the fantastical element, but it doesn't feel pushed enough or like elements were introduced but abandoned half-way through. It would be interesting to see more of the RP/state play a role further into the story.
One final bit: the illustration on the game page/title card is really lovely!