controlling it takes getting used to, you control the character on the top and bottom screen at the same time, battles are in real time, and you have to be moving all the time so you don't die, while attacking
on ds a lot of the attacks are unusable cause blowing on the fucking mic while using the stylus, the dpad and the shoulder buttons is a bit much
on an emu you can map blowing/sound attacks to a button and make macros for the odd input ones (some attacks where cancer to turn on, they all used stylus or a gimmick of the system), on an emu you can map all that
the android and later pc port just removed all of that and simplified the inputs a lot