pretty good game! (kinda weird that people are still voting on this game, eh?)
though the game feels rather stiff, with koopa coming to a complete stop after releasing the movement buttons, the jumping working very clunkily, the controls being mapped pretty awkwardly, and the multitude of glitches, though a number of them don't hinder the gameplay.
like you said multiple times, this game is nearly 2 decades old, so I won't expect you to update it, as you're making a remaster, but just wanted to swing by :)