I took a very quick look at the code, and here's what I gleaned. It says that the CPU frequency must be more than 4 MHz. And it looks like it's coded to run on machines with different clock rates. All in all it seems like a pretty good sign that the code is not locked to a specific CPU.

Next thing you can do is to choose an esp8266 target within the Arduino environment and see if it compiles.

Those two things would be enough to satisfy me that it's worth actually giving it a whirl. More expensive hardware would demand more extensive research.