There's no source posted
There's also no link posted.
Anyway, you can decompile it, but you'll get assembly code.. As long as it uses no hardware functions (PWM, timers, interrupts) it can be ported manually to the AVR platform. With a lot of knowledge of both platforms, you can probably also port the hardware functions.
I've done it once, and it was the last time I will attempt such an endeavour.