"Survival Dragon" is a somatosensory interactive game based on leap motion and Unity 3D. It combines leap motion controller on the basis of the classic unity3D-developed entry game, which makes the game break away from the traditional control of keyboard and mouse. The basic logic of the game provides functions such as game level, setting music, providing help and automatic tracking of monsters in the game, the Leap Motion system can detect and track palms, fingers, and palm-like objects, pre-process the acquired information of each joint point for feature extraction, classify the extracted data, and compare it with gestures in the gesture database for gesture recognition. The Unity3D game engine can integrate with Leap Motion through the API provided in the Leap development kit, and by adding corresponding script code, capture the palm position and coordinate parameters in the plane rectangular coordinate system of the Leap Motion controller, and execute the corresponding code. The Leap Motion SDK provided by unity 3D provides the acquisition of Leap Motion raw data and the basic processing of gesture data.