I loved the game on PC so I thought playing it on the go would be fun but every control scheme is bad. You can use a gamepad but to me the point of a mobile game is not needing extra equipment, I'd rather just carry a laptop around.
Swiping feels somehow off maybe it's just me but I absolutely can't time it right and even then I don't think it would work well with fast beats.
Edge works but I find it really weird to have one hand just do moves in one direction while the other does the rest of the movement and it throws me off a lot.
Having a fourth button next to the middle one to move the other way would help me a lot.
The D-pad is the best option but it's way too small. I don't think I've completed a single floor without miss-tapping at least twice and it's nothing but infuriating. At best you bump into something and lose your multiplier, at worst you die on the spot.
There is an option to change the size of the middle button of the Edge controls so it shouldn't be that hard to implement the same for the D-pad.
Overall the game is exactly the same as on PC and one of the best and most fun rhythm games. With better controls an easy 5 stars but as is it's nearly unplayable for me.