A little TI-BASIC game for the TI-84 Plus CE(-T) and the TI-83 Premium CE.
Download by clicking "Releases"
The source file (pluschase-source.txt) has some comments, so if you want to learn from this program, view that.
Note: The download has comments that look like "[comment_text], you can keep these or delete them (I recommend deleting them because they slow the program down)