Are you getting an error message? Is it saying something about D3D error? If so, here's a solution. https://www.reddit.com/r/playark/comments/7l2qcw/aberration_unreal_engine_is_exiting_due_to_d3d/
If that's not the issue, did you unzip the .rar folder using winrar? You can't launch the game without extracting it first. If that's not the issue, are you playing on a Windows PC? As this game is only compatible with Windows.