HashiChallenge offers randomly generated logic puzzles based on the game principle of "Hashi". By solving levels, you will receive points, which you can use to unlock more features bit by bit. The features include increasingly larger playing areas with more islands, the number of coasts, the maximum number of bridges that can be built between two islands, as well as additional settings for the algorithm that creates the levels. All levels are generated in such a way that they have a single valid solution.

The challenges give HashiChallenge its name and add the special touch: If you activate a challenge, you are no longer allowed to freely build and tear down bridges between the islands according to the basic rules, but must observe the additional rule of the specific challenge. For example, you can only build bridges with one end touching an island with the lowest number of bridges required for the islands. These challenges address all those who are no longer challenged enough with "normal" Hashis.