Ok, the visuals are good and the pixel art is really cool.
Sound effects were nice and the music was right in the theme of the game.
Gameplay wasn't super enjoyable for me though, but maybe you guys made it hard on purpose and I just suck haha, but I didn't like that he would jump on his own if I forgot the space bar down, that along with the enemies being hard to kill even though the lava is so fast that there would be almost no time to interact with them, and some fireballs they would randomly throw that blinked my screen and threw me out of the platforms made it feel quite hard to control.
Really cool procedural generation! I would maybe consider tweaking the platform placement just a little though, I died a bunch because of hitting my head on a higher platform when trying to jump, either that or the tone down the jump power, Im not sure.
But overall, this is quite cool, good job!