Thank you immensly for your review! As a matter of fact I am currently working to try and make the third level. AKA the first level after what we call the tutorial, more challenging. I am tweaking a bit the reflectors as their simplicity make it hard to make nice puzzles. But I am working on making more engaging puzzles. I am also reworking how you can move the pillars themself to make it better. I will try to, as you noted, make it more apparent that we can interact with the light reflectors! Simply adding a prompt would be breaking a bit the immersion I feel as we tried to keep the required text to a minimum. But I am sure there are other ways to bring the player to interact with it!