Sand Snake HD is an updated version of the classic snake game for old phones from the year 1997, but with HD modern 2D graphics.
The player controls a snake on a plane. Currently the primary obstacle is the snake's own body, which grows as you collect precious gems. Each gem has it's own properties - the most expensive ones, the rubies, stay shorter, but give the highest points per stone, three. The emerald stone stays a little bit longer on screen, but gives you smaller reward - two points. The longest staying gem, the topaz, gives you only one point.
As you collect a stone the snake grows by one square, but also it gets a little bit faster. The goal is to achieve the highest score possible.