Tiny Thief is a point and click adventure with some elements of stealth. Set in a medieval world full of greed and corruption, the Robin Hood-esque titular thief stands up for the people by stealing from the corrupt authorities and giving to those in need. The game consists of six themed chapters with five levels in each. For each level the player can be awarded up to three stars by completing the objectives. The main objective which is mandatory for completing the level is to steal a certain object. In addition to this there are two optional objectives, one for finding the thief's pet ferret and another for locating and retrieving one or more hidden objects. Once the main objective has been completed an exit icon appears, allowing the player to move on the next level.
The game is controlled like a traditional point and click adventure game. The thief is moved around the screen by tapping where he should go. As he gets close to objects that can be interacted with an icon appears. By tapping it an action is performed. This include climbing ladders, hiding in barrels and picking up items. Items that have been picked up can then be used on other objects to trigger certain actions. In addition to the puzzles the thief has to stay out of the way of guards and other enemies. If he is seen, he has to restart from the last save point. Therefore it is necessary to time movements right and to use hideouts to avoid being seen. The game also has some elements from the hidden object genre as some items, as well as the hero's pet, are well hidden in the scenery. If stuck, the game offers a built in hint system. The book of hints shows drawings of what the player needs to do next and where items are located. The use of the hints are limited as they are only accessible once every four hours.