I've made the bullets recharge now. I've also made the enemies go up and down! You can turn the sound on and off with M and N (which sounds like candy) now, but there's no icon yet.
I like that you made them go up and down; it changes things up in a fun way! The reload meter works perfectly too, it's a really intuitive system to use and I still have to time my shots. It feels like I'm playing a real arcade game now, which is pretty cool. I'll see if I can try out multiplayer with someone and post another review when I do. Good work on your first game!