I've always thought that was a cool idea to make puzzle games around light and reflection and you did a very good job here. It would be nice to have either a zoom or map/minimap to have a global view on the level because it's a little bit tedious to go back and forth to see if the laser goes in the right direction. Level 4 was the hardest for me. When I had to combine both lasers, it was harder to see which one I should move because they are the same color so maybe introducing lasers of different colors could be nice And maybe even go crazy with color filters and additive color mixing puzzle, idk that could be cool :)
Also, it's a game jam, you don't need to lock levels that the player didn't reach. If someone wants to skip a level or closes your game and wants to come back later, it's nice if they can choose any level freely.