Uses the JMonkey 3 Engine

WASD moves your ball.
Q and E swaps between your 3 pets.
Left-click to attack, when in range.
Right-click to reset your pet to your location (They get stuck sometimes).
Your pet follows you.
Fire beats Nature, Nature beats Water, Water beats Fire.
Somewhat likewise Fire heals Fire, etc.
Each waves brings 0-10 enemies.
At the beginning of each wave (minus the initial one) your base gets 100 points.
When your base reaches 0 points, you lose.

(C takes a screenshot)