Really fun from the get go,
and i like the mechanic of being able to drop whatever charge you've built if you feel stuck and just being able to pick it back up progressively from a new particle you created.
Difficulty curve feels nice as well since you don't introduce neutrons from the start so that the player can grasp the controls better before having to manoeuvre around new obstacles.
The NES style graphics and music are awesome also :D
Good job to you guys !