I can't really try this as im on linux and wine did not seem to like it. A web build would be appreciated but i can see time was not your friend!
Unless you forgot to publish the pck and only put the exe without embedding it.
EDIT actual review after playing:
Its a cool idea basic short but fun, i really like that double jump was not unlocked instantly gives a sense of progression. I like the minimalistic look actually it kinda fits the simplicity of the whole game, although there is room for improvement.
Also i'd suggest for platformer games to have cayote time as it improves the experience a lot.
Great job on finishing though!