Hmmmm, I found the radar thingy a right pain in the a$Łe.
Don't forget though, although you aren't allowed to 'touch' the screen, you can trace it with your finger by 'hovering' over the appropriate spot. Worked spot on for me and can recommend it for anyone.
Years of wasted youth playing cr**py video games finally payed off!!!! Theres a poke in the eye to me dear old mum!!!!
Cheers