Ninja USA vs ! Exploding Paintballs !

* * * Play the popular Ninja USA game which has already 1/4 million players * * * America is under attack! Angry balls are attacking from everywhere and everyone, and they are so many. But a Ninja comes to fight! This little guy will use his ninja skills, kunai and shurikens to make his way through the levels and save the country from these annoying balls. He has to shoot the falling balls until they disappear, and make sure one never hits him. Created with amazing colorful graphics, Ninja USA is sure to bring you a lot of fun. Truly addicting game based on the classic arcade "Buster Bros." known also as Pang, recommended for all the fans of the genre. * * * * * * * * * * * * * * * * * * * * * * * * GAME FEATURES: - 78 levels - 12 different types of bonuses - 3 ninja weapons: kunai, shuriken, grappler - Unique graphics for each level - Jump to level - Game Center online leaderboards and achievements - Crisp and clean graphics for Retina display enabled devices - Easy to learn but hard to put away gameplay - High quality music * * * * * * * * * * * * * * * * * * * * * * * * Follow us on Twitter: http://twitter.com/rtgames Become a Ninja USA fan on Facebook: http://www.facebook.com/pages/Rapid-Turtle-Games/117010321695631 Rapid Turtle Games channel on YouTube: http://www.youtube.com/rapidturtlegames

!Exploding Paintballs! is a tilt-sensitive arcade game with paintballs that float (blue and green) and paintballs that sink (red and yellow). When certain color combinations of paintballs touch they link together and, when the link is complete, explode with a loud realistic explosion noise. The color combinations that will explode vary with each Level. The Game Center records various scores on Leaderboards such as number of Levels completed, number of explosions, best times for certain Levels and best times for all Levels combined. Compete with your Game Center Friends to see who can make the most explosions or who can get 10 explosions on one or all Levels the fastest. Gravity is adjusted by tilting the iPhone, iPad or iPod Touch. Alternatively, !Exploding Paintballs! can respond to touch moves rather than tilt. The exploding noise differs for the different color combinations that explode (e.g. gunshots, crashes, bombs). The sound can be turned off or made into a vibration. There are 8 free Levels - 4 with walls and 4 without walls. An In App Purchase expands the number of Levels to 66 - 33 Levels with walls and 33 Levels without walls. !Exploding Paintballs! is based on a kinetic simulation using the device's accelerometer and realistic principles of physics (buoyancy, inertia, viscosity, Hooke's Law and color confinement). For accuracy and stability it uses a half step modification to Euler's Algorithm as described by Feynman (Lectures on Physics, Vol. 1, Ch. 9, P. 5) and Cromer (Am. J. Phy. 49, 455 (1981)). The screen shots below are: 1) Free Level 1 - Red-Blue. A red-blue combination is shown exploding. 2) The Levels Table. The 4 free Levels are shown together with the Best Times and maximum number of Explosions. 3) Free Level 2 - Red-Blue, Yellow-Green. A red-blue (yellow-green for iPad) combination is shown exploding. 4) Free Level 3 - Blue-Yellow-Green. Some partial combinations are shown linked and one blue-yellow-green is shown exploding. 5) Free Level 4 - Red-Green-Green-Loop. Some partial combinations for the loop are shown linked and one red-green-green-loop is shown exploding.