Had to put up another version shortly after because I'd left an unused item visible.
Still within the time though, and only one click different!

I love the idea you had for the game, however I believe there was miss steps in the execution. From what I gather you were going for a precision platformer, but the movement itself didn't feel precise as you tend to slide on platforms which makes the game feel unfair in some cases. Also, a way for you to restart the level without having to reload the page because a poor placement of where one of your dead bodies could screw up your progression. Overall you have some great ideas, but could've really benefit from more fine tuning.

I really liked the delayed jump (whether it was intentional or not). It was enjoyable to plan out where I would die next to get closer to the goal. Even though the level was simple, the solution wasn't straightforward since the character's jump height is limited and I had to restart a couple of times. Both of these things required more thoughtful movement which, after being expanded upon, could make an addictive puzzle platformer.

I second @john-snyder's idea of a reload button--that would go a long way with extending play time/player retention.

I noticed some odd collision vibrating on the top left platform if you go to the far left of the screen.

Also, the audio for dying was super charming. It encouraged me to "give it another go".