There were some neat bits of game design in there but it's currently a bit of a textbook platformer. Besides, the length, slowness, punishingness and precision while staying mostly fair made it feel like a rage game, to which you didn't fully commit I think. This game could really use some extra movement options, but that would change the game completely The repetition of sections was also over the top. What you do well in the level design is that the world is wonderfully consistent. In a lot of jam games you see that one part was clearly made with a different mindset but everything felt like the same game but with variety.
One part you could improve in three seconds is the bit where you go real high and platform, where when you fall you fall down to a lower section, however you could access that safety net without going over which means that some players will walk there all the way to the right and back.
The art was mostly fine. The background looks nice but it's weird how it has a different tint than the foreground. The player also stands out too much, like he was green screened into existence.
The sounds are a bit weird and loud but do make it easier to move a consistent distance
Overall I think you were consistent enough where even though I kinda raged numerous times it warrants respect!