Tap on either side of Bob to move him there. When you are standing in front of something Bob can interact with (like a ladder or door), tap on Bob to interact. Some objects take longer to interact with, so you'll need to hold your finger down.
Use the arrow keys to move Bob. Press up to look inside of objects to find money. Reach the goal in each level and escape safely! Disarm cameras, hide from guards, disable traps and much more!