with some difficulty, i managed to complete this game.
while i enjoy the mario sound effects, the music, and background and such, i would like to see originality implemented. it is nice to draw from it, though i would say go for something more you, if i have worded that correctly.
the enemies are not exactly the most menacing, though i find it good you leave text up there to know to watch for them. i do not quite understand why spike dies as he kills you.
the controls worked well enough for me, and the walljump was a nice addition. for what it is worth, i enjoyed playing through this game. cheers!