Based on Erich's HID Mouse tutorial, this is a simple HID compliant Air Mouse, with the pointer being controlled using the onboard accelerometer.
A full Tutorial on how to make this project is available inside the Zip under "Simple Air Mouse on a FRDM KL25Z.pdf". It aims to fully explain the process of building the project in KDS, how to set up the board for HID interaction and how to setup the accelerometer.
Thanks go to Erich Styger for the original tutorial and insight, along with his incredibly handy component library.
If i've been confusing or have forgotten to note something (as I no doubt will have), please don't be afraid to message in to let me know and i'll update the relevant files.