Level Design Thumbnails

These are my thumbnail sketches. My idea about these sketches is that a parasitic plant has grown in a nursery and releases pores that turn humans into zombies. For some reason (probably medication) an attendant wasn't affected by it. He/she now has to battle zombie nurses, doctors and babies.

I coloured one of the sketches I did. 

The purple atmosphere is the indicator of the plant pores in the air. The flowers are the parts releasing the pores. The rattle would be an indicator that a zombie baby is present. Rattles can also be heard to further support their presence.