Very stellar gameplay you were able to make here! The rush to make sometimes precise jumps to progress upwards with the encroaching sea level below makes for a game that I can find myself motivated to improve by recognizing level templates and making various types of jumps. It feels rewarding to leave the water levels in the dust when you know one slip-up putting you back on pace with it. The soundtrack chosen fits the adrenaline rush in a sea setting so well, too.
There are various points of criticism that propped up, though.
The most apparent is the lack of contrast between the lighthouse and platforms. Both have large portions of similar whites that can make distinguishing platform edges difficult. This is especially apparent for platform textures that seem to be randomly stretched.
Second, the jumping sound effect , while soothed by the background music, is inherently grainy to the ears, which is worsened when every jump emits that sound.
Third, the jagged stair edges under the ledges of platforms often stopped my jumps even though they feel like they shouldn't.
Fourth, the randomly generated layouts can occasionally impossible jumps, abruptly ending the run without the player's input.
And finally, the player apparently isn't given any room to adjust to the basic platforming controls before indulging into the ascending gameplay. This is very apparent for new players who will need to figure out this specific platformer's rules and mechanics before delving into the main gameplay.