Thank you for your feedback, your video clearly highlighted the issue. It seems that the way I set up the laser cutter usage has caused a significant misunderstanding, and this was my oversight. After using the laser cutter, pressing the F key allows it to be used again; it is not a one-time use item. However, I failed to communicate this clearly. According to my design, once the laser cutter is obtained, it should be used to cut through all doors tangled with pipe-like wires (there are three such doors in the early stages). Thank you for your support!