Loony Zoo

Whilst returning from a journey to the furthest reaches of the known universe, you are captured by aliens. But these are a superior life form and seeing as they are interested in other aliens (like you), they imprison you in their zoo. The only way out, you discover, is through all the cages in the zoo each of which holds a button to open the pathway to the next... and a ferocious alien intent on stopping you in your tracks.