Thanks for sharing your game! I've had a bit of a special experience with this where there was a cool idea emerging... accidentally? Maybe? But it made me have a great time! I should explain myself.
So the game's controls did not fully work for me. I could use the mouse click commands and attract the other character with E, but WASD was doing weird stuff. I could only jump, not walk in any direction. But then during jumps, while the character was airborne, I could change their direction mid-air and use that to move.
Of course this is rather tedious and it's definitely not what the level was designed for, so I ended up playing the game in a different way, which I *believe* was not 100% intended, but it's actually a pretty cool idea?
Basically I repeated this loop: attract A to B, while controlling B throw A towards the platform I want to move to, change to A, attract B to A.
So I was constantly throwing the second character where I wanted them to be and then attracted the first one to them, thus making progress with both together.
And I think that's a pretty cool platforming mechanic to explore and quickly leads to many more ideas. For example, instead of magnets I was starting to imagine something like the Ice Climbers in Smash when they're connected by a rope with the Up-Special. Maybe you could do momentum-based platforming and puzzles by controlling two characters connected by a rope who constantly throw each other to move forward. Of course, the same basic concept still works with magnets. An interesting possibility could be throwing a character away and then attract them again at a certain point to change the trajectory. That is probably already possible in your game as it is, it would just need the corresponding level design.
I do think you had something like that in mind already, but actually making it impossible to just walk with the characters really accentuates this concept of two characters that cannot move independently and makes it more special in my opinion. And it forces the player to be more creative with the platforming.
Otherwise, as potential advice for another jam game... while I was learning how to play in the beginning I found the visual details of the level a bit distracting actually. Maybe go for something a tad more simple if you're not focusing too much on creating a specific atmosphere. That probably gives a little more time to refine other elements, too.
All in all, congratulations for creating this neat little game! It's easy to give more ideas after playing the game, but working to ship something playable in such a short amount of time must be super hard. I hope you had fun while doing this! I definitely had my fun playing and thinking about it :)