The public test build for sandbox 1.1.0 is now released. This update includes UI improvements, new materials, and simulation changes. This update is a bit buggy still, which is why it's in PTB. The changelog so far:

- Adjusted UI

- Fixed crashing bug

- Slowed down water simulation

- Added fuse, a solid item that burns quickly

- Added methane, a gas that can be ignited

- Improved gas simulation

- Added pixel spreading to moving pixels

- Improved fire simulation

- Added salt, a powder that dissolves in water

- Added "Hyperspeed" option that speeds up simulation but makes it look worse

- Added hint text on UI elements

- Added darker background on UI bar (although you can't normally see it haha)

- Added acid, a liquid that melts through other cells

- Added stone, a solid, non-flammable material

- Added lava, a material that burns through and sets fire to flammable materials.