I'm currently planning on making an arcade stick for my Raspberry Pi. I already have all the arcade buttons needed. I also have a keyboard emulator board, which works fine. There are some things that I need that it doesn't provide. I need more pins for the 2nd player and I also need to play around with some of the buttons' LEDs. Anyways...

I have an Arduino Mega 2560 R3. Has anyone done this project before? Does it work as the Leonardo or is there any difference?

Thanks in advance.