( Please note this giant ramble does contain full spoilers for the game )
Absolutely lovely little experience! I really like the locations and I absolutely adore the character design, seriously, amazing job on that part! Not gonna be surprised if I end up making fanart just because of how good they are!!
moving on from that though, I also really enjoy that there is no entity or ghost in the game, instead opting for a honestly way fresher tale of the game decaying on its own due to abandonment and following the npcs and player character as their world slowly falls apart. When I first played I was constantly dreading a cheap jumpscare and I was very pleasantly surprised that there was no such thing, plus I think the shadow ollie scares just being them silently standing in parts of the map, watching from afar and then getting the little error message is a much better way of implementing a more unsettling element to the game.
While the general movement is pretty well done ( I appreciate that the city level takes advantage of Ollie's floatiness for part of the platforming ), as others have said. the camera really could use slight improvement as it's super offputting when first playing, though due to having replayed the game multiple times while looking for secrets I have gotten used to it, but due to the very short length of the game ( 20 minute-ish. even less if you know what you are doing ) getting used to it is not gonna happen easily for most people if they only play the game once or twice. ( also this is totally a me problem and I don't actually think it's an actual issue but the camera only having inverted controls is slightly annoying, even if I understand it's for better giving the feel of a old n64 game )
also I ADORE the detail of the textures ( especially Ollie's ) getting more and more corrupted the further into the game you go, genuinely a really cool detail.
The narrative is also pretty nice and I enjoy the message of cherishing the time you spend with those you love in the face of the end and due to not knowing when that time may come to a close.
I got 2 endings and, while I am pretty sure that the game only has the 2 I got, I am inclined to slightly doubt it due to the game encouraging you to try and find all the secrets after getting the harder of the two endings, which implies that there are more things in the game to find. Alas after around 5 total full game plays I did, I didn't find anything to access a secret third ending.
I did find a weird symbol that strikes me as odd due to being completely different from all the other textures on the ground of the sand area ( seen in pic one ) and a cute bunny looking thing next to it under the water in level 3 ( seen in pic two ).
Tried multiple times to reach it to no avail, so I wonder if it's supposed to be a clue to something or was just added as a little easter egg.
Overall though, a really awesome small experience! Seriously, massive kudos to the dev!!! I really really enjoyed my time with this game! :D