The colliders were a bit wonky, I got stuck once below the ground and in one of those gates that open via button press.
I honestly don't think making the levels timed was necessary. Since the puzzles got more complex anyway the time stress might be too much. Also if it wasn't on a timer you perhaps could've played the dialogue during the level in a non-intrusive way or even recorded it as voice lines, since having to click it kind of bugged me and it interrupted the flow a bit. I also often missed the button to read it ;)
The music got a bit repetitive eventually, I don't know how you would normally deal with that though, longer track that continues playing between levels? More tracks? Difficult for game jams I suppose.
Solid game though!