Thank you so much for the in-depth feedback!
I'm so glad you thought the game was fun and the movement was fluid :) We spent a ton of time trying to nail the feeling of the movement.
I totally understand the frustration from the platforms starting as soon as the character respawns/checkpoint selects. We really wanted the game to have a rapid-fire pace. Fall, respawn, go. In the end, I think that has led to the game feeling a bit unfair in spots. It's a great learning that we'll take into future games!
Glad to hear the download runs much better! We were shocked it ran in the browser at all when we exported it.