Wheelchair Stealth 1.2.2

Can you watch out for a threat you never feel?
This is the challenge.
Never get caught!
The threats will come you behind.
You must find 3keys that will open the next door.
Please come back safe and fast.
This is only the beginning.
Let's do this.

Brief description for control the character:
Tap once to move the character.
Tap again to stop while the character is moving.