Good luck for your competition

Here my new score : 222800
I completed the game 2 times, one with a joystick + mouse (!) and another run with only the keyboard.
The game restarts at level 1 so you can increase the score almost indefinitely...
I tried to find the usefulness of each scientific:
Vegas : invisibility (loss of points if you use it!)
Rastan : turbo
Morgan : slowed enemy fire (loss of points)
Lses : shield (loss of points)
Ex Thalamus : ?
Ferroun : fire triple
Sador : reverse your commands ! (loss of points)
Vilgin : 3 bombs
Festus : final explosion, don't use !!!
Elderet : fire triple
Anthras : fire triple
Manx : fire back/rear
I have not found the power of Ex (!?), if anyone know ?
You do not have the required permissions to view the files attached to this post.