This is a mock-up of a Flash game whose assets I am still making. Not done the cinematic for it yet, though.
My idea: You are a little bat trying to get home. Gameplay includes an appetite bar, as being a flying mammal is tough work and requires near-constant consumption of insects to refill it. Your sonar attack also consumes your energy, and though you'll need it to take down the owls and other predators you face, you'll need to manage yourself carefully in the dangerous night skies.
Music is 'Forest Interlude' from Diddy's Kong Quest.
More coming soon.