Frog Invaders v1.0

Once upon a time there was a city called animal?s city ,there was a science lab in animal?s city in which a strange virus was created by lab?s professor, ,but the virus was accidentally leaked a nearby water canal leading to the nearby forest ,a dry and scary forest. The toads and frogs that was living there drank from the canal?s water and it caused them for swell and overgrow ,,it based and epidemic disease and the virus began it?s influence by the frogs and toads and caused a lot of troubles for animal?s city residents????.