Ok so I did the tutorial but I cant figure out how to fire bullets or spawn enemy. I reread and rechecked the tutorial a bunch of times please help. Attached is my work.
Beginner.gdg (17 KB)
Your game is working here, maybe you have to force the browser to clear the cache (preview your game, then in the browser game tab do Ctrl+F5 or Shift+F5 depending on the browser) 
Thank you so much for your advice I did CTRL+f5 and it works. I appreciate it.