This is an action packed math game with levels of fun and excitement. Having accessibility in mind, special display and control features are available for low vision gamers. Simple but challenging gameplay, with mobile touch screen support, the games can be played on mobile devices as well as on desktop computers.

The math questions are specifically made for intermediate learners. Player clicks or touches on the correct answer to a math question in order to allow HarryRabby to land safely and proceed to the next level. The math questions are generated randomly. The full versions have 5 difficulty levels based on the max possible value of the correct answers.

This game provides subtraction questions with very large numbers. Many game elements are adjustable, such as object moving speed and color mode (high contrast, brightness, grayscale, B&W, inversed display…etc).