Right now i'm working on a new element category, gasses. Currently elements don't interact with each other, my goal is to change that in this update. 

(New sprites are placeholders for now)

The following elements will be added:

 - Fire (spreads across flammable elements and puts then on fire)

 - Oil (produced when burning plastic, like balls. Is flammable so spreads fire)

 - Water steam (produced when fire or a burning object touches water)

And maybe Hydrogen and Lightnings to have a flammable gas, and a way to generate it (as a sort of electrolisys).