Update readme

readme.md

@@ -4,3 +4,27 @@ A clone of the word guessing game [Wordle](https://www.powerlanguage.co.uk/wordl
 for the TI-84 Plus CE and TI-83 Premium CE graphing calculators.
 
 ![Animated screenshot of gameplay](screenshot.png)
+
+### Usage
+*(A video tutorial for the following steps is also available
+[here](https://www.youtube.com/watch?v=_e8pgw9d7S4))*
+
+Transfer [WORDLE.8xp](https://github.com/commandblockguy/wordle/releases/latest/download/WORDLE.8xp),
+[WORDS.8xv](https://github.com/commandblockguy/wordle/releases/latest/download/WORDS.8xv)
+and the [C Libraries](https://tiny.cc/clibs) to the calculator using TI Connect CE
+or TiLP. Then, select prgmWORDLE from the program menu and press enter.
+If this results in an error, [arTIfiCE](https://yvantt.github.io/arTIfiCE/) is
+required for your OS version. If you have not set your system clock, be sure to
+do that from the calculator's mode menu so that you can get the latest puzzle.
+
+Help is available in-game by pressing the y= key while the game is running.
+
+### Compiling
+To build [this repository](https://github.com/commandblockguy/wordle) from source,
+the [CE C Toolchain](https://github.com/CE-Programming/toolchain) is required.
+After installing the toolchain, clone this repository and run `make gfx`
+inside it to generate the graphics data, and then `make` to compile. The output .8xp
+can be found in the `bin/` directory.
+
+### Credits
+Based on [Wordle](https://www.powerlanguage.co.uk/wordle/) by Josh Wardle.