THE GaMe lINk: https://drive.google.com/open?id=1qHwENwkqQ_5-gtGlEu9gDsO46ULrhKH2 What difficulties did you have? When I just been through the GameMaker video-7, (the video is called "spawners") , I met a difficulty I could not run the game. It has error, and the error hint want me to add a symbol into the code in object of spawner. I had been left and right of the video to figure out my mistake I made in the code. However, I could not find it. How did you solve them? It is a little awkward. Mr. Hu discovered that there was a missing close bracket in the first line (BUT the hint in GameMaker said the mistake is in line 2 position 2). I added a closing bracket in the first line of code, and it is perfectly solved. I can run Asteroids again.