Okay, here's something I've been working on recently. I had an older, slapped-together version of this that wasn't working well and couldn't pass variables or modes and all it had was practice mode. Now it has almost all the features I want for the program. I, also, have the multiplication and subtration versions. I'm working on a division version, but that one is a little trickier. And I'm told there are other versions I should make, so I'm not done with these yet.
If you guys want, I can upload the others so you can practice your math skills.
Things I learned:
Put everything on a single timeline frame
Passing variables
Better programming skills