I finally got it so you can erase one letter at a time when entering passwords. I knew that code would work, but it wasn't working. I discovered that I had to put the variables I was using in bank 4 also in bank 0.
This morning I added level 30. It may seem very difficult at first, but not when you're the one making the game and discovered the way to beat it.
Going into designing level 30, I wanted to make a simple level design but have it be really hard to complete. I think I made that here with level 30. So now I need to design 19 more levels. I have an idea for level 50. Also, I want to add in a Super Game Boy border, but I can't draw very well. Does anyone want to take a stab at it?