A point of a game is discovering levels swiping SPACESHIP while avoiding PLANETS.
When you discover 3/4 of current area you will switch to next level.
During discovering every flying PLANET can hit you, so if you have a SHIELD you go back without penalty, but if you have no SHIELDS you go down with decreasing discovering area.
* You get points discovering level area.
* You get one SHIELD every 4000 points or when covering more than 3 cells ten times in a row without penalty.
* You get some SHIELDS when switching to next level.
* Every PLANET explosion gives 100 points.