I'm really happy I went to the game page to read the description, because at first I thought it was a kind of copy of beat saber but with +- instead of blue/red to match the opposite theme, and with collider not really working (but with really nice atom-like particle effects for the plus & the minus). I was completely wrong, I was playing the game wrong and didn't even understood correctly the goal. The actual idea, being inside an atom and trying to balance a bunch of e- & p+, is really creative! And it fit the theme perfectly.
So knowing that, I think you did a great job finding your idea, I also think you did a really good job implementing the mechanics, especially in Godot, and you even did a great job on the music and the particle effects. In the end the weak point is the game design to communicate what was expected from the player, but it's not an easy skill, especially in a 72h game jam, so considering all that you did a really good job