Author's note:

Bubble-Sums will teach math skills in a, hopefully, fun way to kids. The player controls a bubble-gun on the ground. Flying overhead are bubbles containing math equations.

The player must input the sum or difference into a small bubble and launch it at the larger bubble. If the answer is correct, both bubbles will burst. If it is incorrect, only the smaller bubble will burst and the player will have to try again.

Allow too many bubbles to leave the field and the game is over