Although the game has a guide, I'll explain it better in this post.

1. Press "S" to show or hide the gift.

2. Press "C" to show or hide the cookie.

3. Press the oven, the little orange light on the right, to turn the lights on and off.

4. Click on the blue door (as many times as you want).

To be clear, you can't use the gift and the cookie at the same time, so you'll have to use each one when you need them. As I said, the mechanics are explained in the game guide, so there's no need to repeat them. This will be my last game; now I'll start working on A Strange Night of Dreams, which will be released in 2026.