Good concept, with pretty hard levels! It is too bad because I'm sure a lot of people will struggle to pass the level with the two tiny holes to cross (level 4 or 5 ? I don't remember). I think something could be done to make it a bit easier, because it's one of the first levels and it's already extremely difficult. Maybe just giving more time would help? Currently there is no room for error, and for game jam games I think it is better to have a too easy game than a too difficult one.
Other than that the mechanic is really cool, and the physics work pretty well. There is a lot that could be done with that concept.
(btw rien à voir mais j'ai checké ton linkedin et il se trouve qu'on a tous les deux fait telecom nancy ^^' le monde est petit)