Subject of Mathematics is a compulsory subject that is offered to every student in Malaysia. Its syllabus teaches mathematic concepts, which inculcate students with understanding and skills mastery to solve practical problems. However, the difficulties associated with the concepts could easily demotivate the students, hence, to reinvigorate their enthusiasm in learning the subject, an interactive learning tool is required to increase students’ interest and motivation in learning its concepts. In the era of Education 4.0, the development of gamification in other fields included education has risen. The usage of gamification in teaching and learning can be replaced by the conventional teaching method. Therefore, an online mathematics game has been developed for primary school students. The online game has been developed using Stencyl software.Stencyl is a video game development tool that allows users to create 2D video games for computers, mobile devices, and the web. Since the software is free, the teachers can use it as a tool for making online game project at school as project-based-learning.