Space shooter-like minigame

Hello. I am making a minigame related to a space shooter. I followed the tutorial here, but I don’t know where is the problem. First, the gun itself does not show up on the preview. Second, the sound effect I put for the gun plays even the scene variable = 0 (even the minigame is closed). Third, the asteroids/enemies don’t move. Below is the image of the events I created.

Here is the preview of the game.

Thank you!!

Does it show on the scene? I don’t see any create action.

Then add a condition to check that the game is open.

I guess the condition for moving isn’t met. If you have several instances on the scene, maybe you’ll need a for each, to make them all move.

Feel free to try GDevelop Problem Solver by Gruk when you’re stuck.