Pretty nice physics game! If you are going to make this a long-term project, here are some comments I have for you.
Some context about my playthrough: Beat the game, failed a level a couple of times.
What you did well:
Theme was incorporated well, I'm very glad I saw this one because I don't think I've seen anything like this in the jam.
Moving around in the air feels smooth and fun especially when my momentum transfers.
Pretty cool concept of using elements and trying to bond with others.
Suggestions:
Speaking of elements, you can add interactions that don't involve just winning. Things like palladium would make your character gravitate towards it a little bit since that's how it acts towards hydrogen in nature.
The game in general requires polish for a more long-term build like sound effects and cleaner visuals but I'm sure you're aware of that already.
If you make more levels, I honestly had the most fun with open levels where I can launch myself around so consider adding more open levels!
It feels like you can play the game with only 1 control (either A or D). I basically only used 1 letter the whole time. This isn't necessarily a problem but it does make the controls feel a bit redundant. There are a ton of random ways you could fix this, maybe giving each node individual energy or giving them different effects etc.
Something about this game makes me think it has a lot of potential. I think you did well given the time constraints as well. Good work!