Spinvaders is a super simple arcade game a la Space Invaders in which you must destroy enemy spaceships in order to go throgh levels. Every level will display a formation of enemy spaceships that you have to destroy as quickly as you can before they destroy you. Some of the enemy ships require you to shoot at them twice in order to destroy them completely. The game gives you points for every ship you destroy and also gives you bonus points for accuracy, that means that the less bullets you use to destroy the space ships, the higher your score will be.
As you advance in the game, you will have more spaceships to destroy per level and they will move faster. You have three lives and if you run out of them, the game is over. Unfortunately, the game doesn't offer any customization options whatsoever, graphics are very poor and simple, sounds are average, and the music is suitable, but repetitive.
All in all, if you are looking for a simple shooter game to pass the time, Spinvaders may work for you.