Thank you! Yeah the light mechanics were a bit tricky to make puzzles for. On top of that, since the cutscenes took so long to make, I didn't have much time to make puzzles, so I ended up opting to have more simple timing stuff. I definitely would've loved to make some more complex puzzles for the game, just didn't have enough time.
The introductory puzzles are a tricky thing because I really wanted to try and communicate the main mechanics without actually telling you anything. I think that some of that worked, but I get that some of it didn't. I'll think carefully on how I want to change that for the future. Also, I like the suggestion of highlighting stuff when it changes - that could definitely aid in the puzzle-solving process.
I'm glad you liked the story! I totally get that it's a bit predictable - I realized pretty early on that I'd have to have a content warning, and that would end up spoiling the game pretty bad, but I don't think there was any way around that unfortunately.
Anyway, thank you so much for the detailed feedback! I'm glad you're looking forward to future developments - I'm planning on this eventually becoming my first Steam release, but it'll probably be a while before that happens. Feedback like this is invaluable toward getting the game ready for that, so I really appreciate it. :)