Hell of Sand is a sandbox game where you are given a set of tools to play with. There is no real point to the game, no winning, or losing. It is a creativity game where you decide how to play.
There are four spouts at the top of the window that are naturally there. You can determine how much these spouts output by clicking the name on the bottom right hand of the screen. The first spout is sand, then water, salt, and finally oil. The spouts can be opened at levels zero through five, five being the largest and zero shutting off the valve.
Also, at the bottom of the screen are the tool selects. The tools are as follows: eraser, concrete, C4, gunpowder, napalm, nitro, well, spout, water, plant, oil, salt, sand, torch, wax, wall, and fire. The eraser erases everything by just pointing and clicking. Concrete is a form of wall, however, you have to give it time to dry or set for it to become stationary otherwise it falls like sand.
C4 is an unreliable explosion source. You can put the same amount of C4 in many different places and it will change the explosion output at three different levels. A C4 explosion is perfectly circular. Gunpowder is another explosive. It falls like sand unless supported by another substance. When lit it lights up like a sparkler and falls eating at whatever is there. When lit napalm eats at what is around it in an imperfect magnification of how it was set. It is also necessary to support napalm. The most spectacular of the explosives is the sand like substance nitro. When lit it explodes violently and leaves branches where a spark has risen then fallen sharply. The major explosion radius is predictable, however, the arms of the explosion vary from explosion to explosion.
The well is a stationary object that produces oil. A spout is much the same but it produces water and can be made to look like a rain cloud. The torch is a stationary object that produces fire. It cannot be put out unless an explosion erases it. Wall is a stationary object, unlike concrete it does not have to dry. It is not flamable.
Water can put out fire, grow plants, and mix with salt. Unless it is mixed with salt, when water is touched by plant or versa the water will turn into plant material. Water will also rise to the top of oil. Oil is highly flamable. Salt is not flamable and can mix with water. Sand is not flamable. Plant material stays where it is put and can change water into plant material. It burns faster than wax. Wax is a stationary object that burns at a slow rate. When burned pieces of wax will fall.
Another tool in Hell of Sand is the size of the pen. You can click, on the bottom right hand corner, the pen size and choose between sizes one, two, four, eight, sixteen, twenty four, and thirty two. One is as small as the end of your mouse and thirty two is quite a bit larger.