Welp, it’s almost time, and this is what I have. It’s far, faaaaaaaar from complete, but I think I can only add a few odds and ends. This is basically the final product.

Hope you enjoy it.

WASD move your ball.
Q and E swap 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 your base gets 100 points.
When your base reaches 0, you lose.

Link to the game.