Hey, thank you for your detailed review! :D I'm more than happy to see someone spending so much time on one of my games~ <3 I wasn't sure on how much impact the bugs would have on the player's motivation, as I as the dev was already used to cope with them.
Regarding the level design it is true that the puzzles got more intuitive later on, because at first I was mainly setting up the scenery and also trying to make content as fast as possible because at this point the jam was already nearly over, after I have been busy trying to make my game at least playable. ^^' I got more relaxed when I kinda gave up on it, resulting in better design. Though I have to say that all puzzles are beatable without exploiting glitches. They just need rework to be more accessible.
The music is actually meant to be uncomfortable, to underline the inevitable fate of the protagonists. Glad that it grew on you over the time. Also thank you very much for your appreciation for the character designs! This means a lot to me as these characters have existed for quite some time in my life. I redesigned them for this jam, but J.E.K themselve is actually already 25 years old! And it's funny that you wrote them with an "A" in the middle, as "JAK" is the name I gave them initially. Little did I know that another guy with the same name would come into existence just in the same year... I didn't know until many years later, but regarding this other guy's popularity I decided to rename my character for this jam.