I want to start making notepad codes and need tips

I want to get into makeing things in note pad like games ect so if someone could explain some of the commands and what they do it would be much appreciated.
The only thing I made so far is kinda a login thing with a out put to it, I made it using a tutorial thought but here is the script:

@echo off
color b
cls
echo. Text here.
echo. text here.
echo. Text here.
echo.
set /p user=Username:
set /p pass=Password:
cls
echo username=%user%password=%pass%->notepad.txt
exit

I've been thinking about how this works and what I've come up with is the "Cls" will run any "echo" under it not to sure if this is what it really dose or not thought. Any ways if some of you can help me out by letting me know a few basic commands I shought know a long with what they do please do it would be much appreciated.
EDIT: I'm all so using default note pad not notepad+++
I found out how do program with the CMD check out http://www.sythe.org/showthread.php?t=1467014 to play my games!

 

Well, you should first try to figure out what coding language that is.

*Hint: google it*

Then when you realize that is a waste of time, start learning about the C language.