Go to the link above. It will lead you to the official website for GunBound Japan: Planet Battle.
Now, click on this as shown in the image provided.
Okay. Now a new window should pop up. Choose the second option and you should see your little mini gunbound start. This is used for practice purposes although, if you have an account... you win 2000 gold if you can beat the girl.
Have fun! I just thought it was funny to share since not too many people know about this. Why didn't they make GunBound like this? Instead of downloading 300 MB of crap?
Lost the first few times but after i got used to it, I beat her. It's kinda weird shooting w/o knowing the angle though. It's funny how I stay in the same spot and she misses even after she hits the first time.