A nice throwback to the game itself, but I don't remember MapleStory's controls being so... buttery. I slip around everywhere and have a great deal of trouble stopping myself from slipping around. Jumps off angled platforms are tricky as well since it isn't really a slope; they act more like stairs in that you can fall down the ramp in steps, which can affect the height of your jumps.
Everything else, though? Pretty much a faithful 1:1 recreation.