Make sure to have Python installed. Download the entire package onto your computer and cd into the Battle folder. Then run the main.py file with this command: python main.py. Directions may slightly differ depending on the type of system you are running this on. This program was made using Python 3.7.0 on Windows OS.
NOTE: Don't run this program with the Windows Command Prompt. It will still work but the colors don't show up correctly. This is how the program should look at start.
Your only goal is to reduce your enemies HP to 0. If your HP reaches 0, you lose. If both you and your enemies HP both reach 0 on the same turn, you still lose. There are certain mechanics in the game that I'll let you figure out on your own. Good luck.