help with imagecollision pls

Blitz3D Forums/Blitz3D Beginners Area/help with imagecollision pls

Can anyone give me some pointers with the below game please

http://www.geocities.com/gjpollitt/game.zip

I want to test if the laser hits the bat, how can I do this properly? The code as it stands detects a hit even when the laser is on the other side of the screen !!

If it hits the bat, how do I delete the bat image?

How would I approach this code if I had 10 bats? Would I have to create a type array? How would I add/delete bats from this?

Thanks for any help I may receive :)