Long feedback:
The intro sequence is from another planet.
Main menu is wonderful and is probably the most polished main menu I have ever seen in jam game.
Little beeps when you hover over the button give really satisfying feedback.
Game is very polished and looks like a demo to something bigger. It has Portal-like vibes with solving puzzles and narrator.
Graphics is simple and clean. It feels like there are no unnecessary vertex, textures are pixelated which gives give old school feel and bonus point: everything works well on my laptop with iGPU.
[and there was no black artefacts on my setup]
The puzzles were pretty easy and most of them could be skipped by jumping on 45 degree edges.
Sadly game feels very short, but it takes pretty long time to finish it... I think it's because there is a lot of time where you just walk inside corridors and parts with puzzles and interesting gameplay are short.
Throwing heart mechanic is nice, but it was introduced so late into the game that I used it only 3 times and that's it.
[IMO it should be available from the beginning and all puzzles should be build around that + this mechanic could be expanded so you can throw heart and... Do something. (Maybe press a button with it?)]
Hard to tell anything about audio.
I don't know if someone else had issue with narrator, but it was very low male voice with constant pop-like artifacts and it was hard to understand what narrator was speaking so I need to stop and read the subtitles + I can't focus on music etc.
TLDR: Game is very polished, but short and left me wanting more.