On hard mode, the green square stays near the edge. I go get it. A red square pops out. Real possible >_>. Oh,and one time, the green square hid behind my highscore of "8". Tricky devil.
On challenge 4, one or two things will happen
1. You're shield is a goddamn idiot, and stops following the dragon EVERY 10 damn seconds, leaving sword open
2. You're robots are too damn slow, and the shield dies, which means the sword will die next
Challenge 4 is too hard. Why? My robots are idiots but the opponent's not. My shield is RIGHT NEXT to the enemy and he attacks the sword, which is 2 feet away from him.