I hate to be the bringer of bad news, but Lytesander down there made very good points, which sum-up my own experience of the game pretty well. Saving Accroche definitely has its merits and strong points : the opening screen is very pretty, the in-game movement feels very pleasant and smooth, which makes navigating through the game a mechanically enjoyable experience. But...otherwise, yes, it needs a lot of improvements.
I won't go over what Lytesander already mentioned, but I'll add that Saving Accroche suffers from writing & narrative design shortcomings : the exposition isn't written like a story text you want to read, but more like a bunch of information being thrown at you very slowly. The floating "jump here, double jump here, don't fall in the death trap" text breaks the immersion because the font doesn't work with the background...and the actual game looks *nothing* like the opening cutscene and title screen, which is also puzzling. AND the music (which is about 500% too loud) really doesn't fit any other aspect of the game. Finally, it's a bit of a detail, but not having the possibility to quit the game by hitting escape is always a little bit annoying from a player perspective.

Now of course, this is a game jam, and the very *reason* we're doing this is to improve and try things out, so by all means, don't be discouraged by this criticism, even if it comes across as harsh or unfair! I'm only telling you all of this because I'm seeing the potential in your game and I'm sure that, with a few fixes, it can blossom into a really cool experience.

I'm sorry. I'd like to leave a better rating but this game is too broken to give a fair rating for. 
Game Design: Too much exposition. Nothing wrong with a story set-up but if possible see if you can tell your story in the course of the game and not just at the beginning. 
Sadly fun was 1 star because without death and enemies working I was just double jumping through most of the level and when I fell into a trap I didn't respawn either and just sat there.
Innovation: It was a normal platformer and not even a working one.
Theme: You hit the theme in the story but I would have preferred the mechanics somehow include it
Graphics: The graphics were good. I like the animation of the main character double jumping. While the background is very flat and simple some depth to them (shading) would have added an unique aesthetic.
Think Castlevania.
https://www.google.com/search?q=castlevania+video+game&tbm=isch&ved=2ahUKEwjuoO-q3ovrAhUQJKwKHeDPDqsQ2-cCegQIABAA&oq=castlevania+video+game&gs_lcp=CgNpbWcQAzICCAAyAggAMgIIADICCAAyAggAMgIIADICCAAyBggAEAUQHjIGCAAQBRAeMgYIABAFEB46BQgAELEDOgQIABAeUP8mWPkzYPE0aABwAHgAgAE8iAHJBJIBAjExmAEAoAEBqgELZ3dzLXdpei1pbWfAAQE&sclient=img&ei=06suX67rHZDIsAXgn7vYCg&bih=920&biw=2560&rlz=1C1CHBF_enUS809US809#imgrc=h1g2hfXebqMroM

Audio: The Star Wars Dubstep didn't really match the aesthetic of the game and there wasn't any credit given to the artist who wrote the song. Unless that artist is you and then I ask why you left the Star Wars references in? Please be careful with music sources. I very much doubt the composer or remix artist gave you permission to use his/her song. Make sure its royalty free music. Unless you wrote the music in which case see above comment

If you get a working build in later I'd like to play it again.