This article presents the LIFEisGAME project, a serious game that will help children with ASDs to recognize and express emotions through facial expressions. The game design tackles one of the main experiential learning cycle of emotion recognition: recognize and mimic (game mode: build a face). We describe the technology behind the game, which focus on a character animation pipeline and a sketching algorithm. We detailed the facial expression analyzer that is used to calculate the score in the game. We also present a study that analyzes what type of characters children prefer when playing a game. Last, we present a pilot study we have performed with kids with ASD.