Thanks for the translation! I enjoyed it very much because it's reminiscent of classic RPGmaker games back in the day. Here's the first part of my full playthrough for anyone interested:
I generally have no complaints about the script, the dialogue felt natural and I didn't notice any typos as far as I remember. Most of the puzzles were fine and some were even really clever, but a handful of them did leave me scratching my head, especially the "Odd One Out" section. I don't know if the hints ended up being more vague when you translate it to English, or maybe it was as intended by the developer, but the game does troll you really hard at times!
Also, the description mentions how SPIEGEL EI isn't a horror game, but I would say it fits perfectly well in the genre considering the visuals and themes in the story. In fact, it's exactly the type of horror that I really love where it's more about the psychological aspect instead of relying on jumpscares and movie cliches. But that's just my opinion.
Anyways, good luck on your future projects!