Been working on this for some months now. Getting back to math took me a long time.
Objective: Throw water balloons to colorless people and animals that walk backwards
Controls: Just click screen.
Music: random 3 songs at start, just close it and open it again to hear.
http://s30.postimg.org/71ctd3wc1/10481156_10152535732267760_2025697742_n.jpg
To Do:
-Main Menu
-Fix Animations
-Scale enemies based on distance
-Add score
-Improve Animations
-Give a feeling of depth.
-New background
That for now, need some feedback to add more stuff 
Desktop: https://docs.google.com/file/d/0BziW53Fw7ZDqM1B2VFBhWm5vTjg/edit
Any feedback is appreciated
Check out the prototype for a source code: http://www.java-gaming.org/topics/iconified/33025/view.html
Sebastián.