The founders of Kolibri Games, developer behind the hugely successful mobile hit Idle Miner Tycoon, are leaving the studio. Joint CEOs Daniel Stammler and Janosch Sadowski, as well as chief technology officer Oliver Löffler, will depart by the end of April to concentrate on their next venture, holding and investment firm BLN Capital. They leave just five years after Kolibri Games -- then known as Fluffy Fairy Games -- debuted with Idle Miner Tycoon, and just one year after selling 75% of the company to Ubisoft. The trio will remain shareholders after they depart, though they plan to sell the remaining 25% over the next three years.