This paper describes a customizable educational escape game-like project that aims to support Computational Thinking (CT) learning and evaluating processes. Recognizing the importance of fostering computational thinking skills in basic education, this work focuses on the design and development of a customizable serious game in a virtual reality environment, based on escape room concepts, containing various minigames designed to promote CT. The collection of minigames is based on Bebras challenges, which can be regarded as unplugged activities originally designed to stimulate students’ interest in computer science. The sequence of minigames follows categorical flows, defined so that specifics informatics domains and CT skills are trained or evaluated. For this purpose, each minigame implemented is associated with informatics domain, CT skills (abstraction, algorithmic thinking, decomposition, evaluation, generalization), level of difficulty and student’s age group, enabling the environment to be customizable. The project is being developed using Unity 3D framework and next steps include testing, conducting case studies in traditional classrooms and assessing the outcomes provided by students and teachers.