First of all, really sorry for being a month too late, but better late than never!
A month ago, JamesV released SQRXZ for the TI-84 Plus CE, as a clone of the TI-86 version by Jimmy Mardell, itself based on an Amiga game of the same name. The goal is to control an ugly bug (a Sqrxz) through a dangerous world filled with traps and enemies such as Blobs, Hedgehogs, Bats and more. Besides nice sprites, animations and collecting items, this game runs at approximately 60 FPS, which is surely good enough for nice smooth gameplay. James included 16 levels, but since the structure of the levels is the same between platforms, you can play any level that has been created for the TI-83, TI-83+ or the TI-86. If that is not enough, he has also created a world editor, to provide more fun if you are done with the current levels!