Version 4

New particles! Water, Oil, and Plant.

• Sand sinks through water.
• Oil rises through water.
• Plant grows through water.

Version 3

New features:

• added sand particle, which falls down and slides down piles.

UI improvements:

• add button to clear whole canvas.
• show which brush and size is selected.

Version 2

New features!

• Multiple brush sizes (1x, 4x, and 16x).
• Wall brush and NEW eraser brush.
• mouse movement is interpolated, so no more gaps in drawings.

Version 1

Basic render into canvas, allow pen input to draw walls.