Glitch found: Make a thin line of any solid type of wall on the very bottom of the screen and put some particles on it. They will still be drained through the wall. And by the way, water in low pressure is suppose to vaporize?
What tman said. Water actually boils at any temperature almost in the vacuum of space.
Also, it's very normal for particles to disappear near the edge. You need at least two wall spaces worth of distance from the edges to make sure pressure and particles aren't routinely deleted thinking they're escaping. It might be bigger than this, experiment and see. : D
There's a bug with Switch. If you make a 1 pixel wide line of switch, and try to pass current from a far side (while switch is turned on) to the other far side, it will keep repeating a spark.
........................................... / -- / Metal ........................................... / = / Switch ........................................... / P / P-type silicon ........................................... / | / Metal ..-------=======--------......... / . / Blank .......................................... .....................P.................... .....................|.................... .....................|..................... <-- Recreate this, turn on switch, put spark on a side wire, and you'll see the bug. ...........................................
More bugs: Photons passes through breakable metals and not normal metals. And photon beams can 'charge up' if hold down long enough when simulation is paused.