Absolutely loving it! some visual representation of the field/force vector would be nice, as the charges seem to affect things globally. Also it seems thatyou can stack charges on a node indefnitely, but there are almost no difference past like +30 - maybe it would be worth adding a cap at some point, and multiclick/scroll to increase the charge would be nice too!
From content perspective, some moving targets, or denser/electrically charged asteroids with with their own forces would make the game more dynamic. It's also possible to put the nodes almost out of screen, and then the numbers are mostly culled away.