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.