So I was going to put three flies in the game. But that was impossible since I couldn't make the third fly swattable even though the code I wrote should have made it do. So I decided to attempt two flies in the game. That worked.
So I have an idea for the game. It seems pretty simple, but I don't know if it will work. I spent all morning and part of the afternoon on it. I got it working, but I don't know if it will be fun enough. I sent my idea ROM to the publisher of the game and we'll see if he likes the idea. It involves characters. It kept erasing the characters on the screen. I was angry and working on it for about a few hours, until I looked at the code and realized I had put "clearchar" in the code at some point. Why did I do that for? So I removed that and it began working good. Oh, I remember why I did that! It was to erase the light blue letter K that showed up at the top left of the screen. It must have been char0 since I now am using that in the game.
I have decided to use the Voice module for the game. Unfortunately I can't test whether I did the Voice code correctly on my real Odyssey 2. But it works okay in the emulator. I went to sleep at about 4 p.m. and woke up around 8 a.m. I slept 16 hours.