Space Combat (50% Completed Program)

I started writing another Text based game. This one is a little "graphical" with moving objects and stuff like that.

I haven't put the shooting feature yet.

The only problem that I am facing is that I used a delay function
to delay the movement of the "creature" (I haven't named it yet..)
this delay function is also affecting the spaceship movement.. I dont know how to rectify this. )

also, I think I can write the shooting function myself.. but I dont know how I can "eliminate" the "creature" after that.. (of course, I can right now say "You won. Game over" but what if there're so many creatures ? )

I'm going to post the code in a little while..

right now, I want you guys to see this program and tell
me your opinions on...

the concept
the creature
the spaceship
anything at all that you'd like to comment on..

thanks for your time.

I downloaded it, and thought it was pretty cool. Nice so far, I would like to see the finished version.

BTW I checked out your site, you got some nice little programs there.