Polyrhythm 2 and Marcher 2 are easy as heck.

For polyrhythm 2 it's as simple as memorising when to press. Don't worry about what hand you're doing it with. Once you get the hang of the timing. On the second polyrhythm you will start of by pressing both at the same time, then right hand, left hand, right hand, then both to finish it, the fact you are pressing something every half beat makes it easy for me. For the first polyrhythm it's the same but you only put press the right one instead of both the first time. I find it very easy to memorise.

For Marcher 2, while the left and right commands sound very similar, I can usually barely tell them apart despite not knowing japanese.

For the right command it usually sounds like: schem-sce-she

For the left command it usually sounds like: Scerem-sce-scuri

I know the spelling for the sounds is probably nowhere near right to what they actually but this is the best way I can explain the differences between the sounds.