Hi! nice introduction to gamejams you have here. The atmospherics and overall feeling of the game was really melancholic, I liked it so much! Even stayed with the BGM while doing other things since it's so peaceful.
The puzzles were really interesting and well done, which is to admire since making a fun puzzle game is difficult.
The only thing I didn't quite like was the checkpoints. Currently I experienced a bug (Linux version btw) which made that when I die the second time after a checkpoint, I have to restart the game from the beginning. ALSO enemies blocking completely my path made it difficult to use the light-boxes (I get that may be intentional, to avoid mindless placing of the boxes).
The torch mechanic I find really fitting for this jam btw like Just Start a Fire or smth like that. Fitting.
Good game! congratulations on your first jam !!!