Wow, this is insanely impressive for a jam game. Probably the most polished, fully realized game I've played so far. The fact that you guys were able to squeeze in so much content in such a short period of time is amazing. I'm legit curious, what was your process that allowed you to work so fast across multiple genres?
Anyway, onto the actual review.
Story: At first I was worried the game was going to simply be about a person wallowing in self pity, but I was relieved when it started moving in a more positive, supportive direction. I think my favorite bit was the section where Hikari confronted the sources of his anxiety one by one, and realized that his depression was preventing him from accepting their support and working to improve his life. Watching him overcome this was cathartic, and I thought it was very well done.
Art: The simple art style works quite well as a portrayal of a more abstract story (And I imagine a nice way to finish within the time limit). The color choices do a good job of making what you can and can't interact with readable. I was really surprised when the game suddenly shifted to 3D, and played around with different styles. For the most part, it worked really well. The only section I felt was a bit lacking was the first person platforming bit at the end, it felt less cohesive visually than the rest of the game. Which I suppose was the point, since he was waking from his coma, though I think it detracts a bit from the clean minimalism of the preceding sections by looking unintentionally amateurish by comparison.
Music: I thought the more thoughtful solo piano really served the simplistic visuals of the game well, while capturing the ponderous nature of the story. In particular, I like how the section after the puzzle bit was the same song, but in the major key instead of minor. A small touch, but a nice way of portraying the character working through his problems.
Gameplay: The variety of game modes was unexpected, but welcome once I got used to it. Exploring the world and talking to NPCs was very engaging, and the clickable words added some nice interactivity to the written sections. The puzzle section in particular was well thought out, and could have easily been a game jam project on its own. I can't believe you guys even had time for some bonus puzzles, lol. A few (hopefully constructive) nitpicks:
1. The top down 2D section at the beginning had some clunky movement. You had to hold the arrow key down for waaaay too long to move across multiple tiles in the same direction, which meant mashing the keys was the fastest way to get around. I imagine this is because it was reusing movement from the puzzle section later? Speaking of which... 2. The controls during the puzzle section were a bit overly sensitive to me, it seemed really easy to accidentally do inputs twice when doing actions like switching characters. I don't know if it was reading key inputs based on some sort of timer or simple when a key went from unpressed to pressed, but the latter would work much better. 3. The platforming during the first person section at the end felt unnecessarily clunky. I would remove the hallway with the tiny platforms entirely, as it doesn't add anything to game and it breaks up the pacing of the final section.
Overall: Despite my nitpicks, this is easily a 5/5 jam game. With a bit more polish and time, I could easily see this being a solid, full-fledged game. You guys should be proud of what you've accomplished, and I look forward to seeing what you come up with next!