Phone call, very short and very few questions. Didn't even ask about my background and wasn't very interested in knowing me better(was HR interview). Makes me think they interviewed me just to do it.

Phone Screen followed by a 4 question coding challenge on Hacker Rank. After that there is an onsite where you have to develop parts of a game using TDD with some team members. If you do well on that you talk with a cofounder about the company. Throughout the entire process the recruiters and engineers I talked to were friendly, quick to respond, and helpful. Great interviewing experience.