HOLY COW. Now I can proudly state that I know my molecules! Now seriously. This is impressive, a cool innovative idea and a whole bunch of levels. The gameplay wasn't the main focus of the game but the thing that attracted my focus is the fact that you have to think what ions you want to push away in order to reach the one you need. Some people don't create many levels because they think that the player will see the first one, play with the functions and leave to make a rating (I passed every single one of them). This one might be one of my few favorites in this category so far. Good luck on the voting period!