Quite nice! As others mentioned, I also see it as a flappy-bird-like (is this a genre now? xD) However it's quite unique in it's own right and I think this would actually work quite well as a hyper-casual game for mobile.
The music is nice! Gives it quite a silly vibe, but in a good way. The graphics are definitely good enough, even though the lava is a bit out-of-place. Something vectorized like 2 - 3 layers of waves moving up and down, left and right could've maybe worked better? Not sure though!
The controls weren't super clear to start with. A little description or 2 frames of tutorial could've helped a lot I think. But once I got the gist of it, it's simple and fun
Overall, quite polished, simple idea.