How a teen battling heart disease got his video game into the App Store

Like many 13-year-old boys, Hunter Allis loves video games. His dream is to create them.

Allis also suffers from a rare congenital heart disease called hypoplastic left heart syndrome. The left side of his heart is unable to effectively pump blood to his body.

Thanks to the Make-A-Wish Foundation and mobile app developer Bottle Rocket, Allis got the chance to live out his dream. He created a game called Planet SRAM that made it to Apple's App Store.

In Planet SRAM, which was released on Monday, characters fight against giant tree creatures that shoot snakes out of their head, as well as other types of monsters. Players explore the world while shooting at opponents who are attacking them.

Allis—who lives in East Hamption, Connecticut—started developing the game with Bottle Rocket in 2015, told CNBC that in his younger days he would fill sketchbooks with drawings of his future video game bosses. SRAM's concept art, characters and game levels all came straight from Hunter's ideas and drawings.

"I was flipping words around related to my ideas when I realized SRAM spells Mars backwards," Allis said. "It fit into my backstory of a rocket ship crashing on a planet and needing to survive by beating different creatures."

Continue reading on CNBC.

Published by Bottle Rocket in Culture, Planet SRAM, News and Awards, Make-A-Wish