Serious game / brain training :
Enter solutions before the bubbles hit the water.
The water level rises if a bubble hits the water.
The game ends once the hills are submerged.
Tips : Be accurate - wrong answers reduce your score.
It's faster to type numbers using the number keypad on the right of the keyboard. Turn on Num Lock to use the keypad.
Distribution : Internet - FreePlatform(s) : Browser (Flash)
Links