<![CDATA[The high level of abstraction in basic programming concepts sequential, branching, looping, and functions frequently hinders early-stage university students from constructing accurate mental models of control flow. Existing game-based learning media largely operate on two-dimensional displays and have yet to represent the dynamics of algorithm execution spatially. This study developed KudBlox, an educational game built on the Roblox platform that integrates an immersive coding approach into a mission-based game format with 12 progressive levels across four programming concept zones. Development followed the Multimedia Development Life Cycle (MDLC) method. Product feasibility was assessed through two stages: media validation by three expert lecturers using an instrument adapted from the Learning Object Review Instrument (LORI), and a usability test involving 10 early-stage university students using the System Usability Scale (SUS). Media validation yielded an average score of 91.75%, categorized as Very Feasible. The SUS usability test produced an average score of 82.00, classified as grade A Acceptable. These findings indicate that KudBlox is feasible and usable as an independent learning medium for early-stage university students to understand basic programming logic concepts through three-dimensional visualization]]>
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