I was having so much trouble getting homing missiles to work, for some reason. I gave up a few times, but figured it out at last, so I'LL call today a success.
Thanks Nico for your words of encouragement :)
D'oh, only 2 days in I totally forgot about this.
I'll try starting over then. My mock-up currently looks like this. Once I'm done with it I'll begin making a prototype.
Forgot to mention - the grass on the left is the old grass, the one on the right is the new one. Might still change it so the dirt looks like a pathway or something.