Math Adventure Addition

Game Description
Follow the hero on a epic number adventure! Collect all the gems, release the keys, and rid your path of meanies. Can you solve all 30 levels?
How to Play
Choose the addends you'd like to practice. Use the left and right arrow keys to move the math hero back and forth. USe the up arrow key to jump.
Tags
platformer, addition
Skills
Mental math practice.
Apply properties of operations as strategies to add and subtract.
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
Fluently add and subtract within 20 using mental strategies.