Welcome to Space Attack! You are a rocket ship and need to shoot at random objects. Move your mouse-pointer to move the rocket. Press Space or click to shoot. Try to aim at the objects. Objects that you destroy will give you money to buy upgrades after you lose all of your health. The four upgrades increase your firing rate, shoot more bullets, increase bullet explosion and give you extra health. The maximum will allow you to shoot bullets (or a wave of bullets) every 0.1 second, and you will be able to shoot up to seven bullets at a time. You can get up to an explosion level of 10 (extra lvl 11 is included). You can buy the health upgrade as much as you want. If you survive long enough, you will encounter a boss. I recommend having lots of upgrades, since the boss is loaded with health, and you need to hit it with 9999 bullets. Defeating it will end the round and will give you a lot of money. Good Luck :)
