Answer:
The more you work the more I'll eat.You keep me full I'll keep you neat.
When you buy me I am costly, but the only use I have is hanging only. What am I?
I have Eighty-eight keys but cannot open a single door.
When it comes to me, you go on red and stop on green. What am I?
One simple click, one simple flash. A piece of memory, for years I'll last. What am I?
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls