That was cool! The concept is fun, and the setting is interesting. There were also some neat precision platformer bits.
That said, with all due respect, I feel like the level would still be a good level of hard (and long) if the platforms merely regenerated after a time (or if there were checkpoints). Mandatory beginning restarts feel quite artificial, especially given that the level is already quite hard.
However, I will say: I appreciate that the part at the end of the level was NOT the hardest part! That's a good design choice.
The art has a distinct style, and the Conan-esque character design is quite charming! However, there's one problem I have with the graphics: a lot of the background tiles have a similar saturation and value compared to the main character. This isn't universal (the mossy stones in the 2nd layer have a good contrast), but it happens often enough to be somewhat straining to the eyes.
Good job including audio control! Unfortunately, it seems that the menu button hover sound always plays at max volume.
Good work!