Starship Ranger 1.97

Your Matherplanet is suffered from invaders - extraterrestrials. Enemy aircrafts bomb the Earth. You are the last hope of the terrestrials. The best starship is prepared and well equipped. Don't lose the time, good luck!
Your mission is rather complex. The number of ETs is great, they are very dangerous and aggressive but the most perilous are their bosses. Their aircrafts attack you each 20th level, in case you manage to reach it. All your skill and deftness are necessary for you in this intergalactic war.
To rule your starship you can use a keyboard as well as a mouse as well as a joystick (great experience!). Don't forget to fill up using special fuel stations.
The advantages of the registered version:
" 0ne hundred levels (100) instead of 20 in the unregistered version for never-ending game;
" Three skill levels (novice, expert, master) for all tastes and ages;
" 4 invincible bosses and a lot of enemy aircrafts;
" Nag-screen will not disturb you any more;
" Free updates;
" Free technical support by email.