Block-based programming is typically based solely on graphical user interfaces (GUI). However, some approaches provide tangible interaction wherein users create block programs with GUIs to control physical robots or use physical blocks to create programs displayed on a vertical display. With these systems, users split their attention between the GUI and the physical objects. Split-attention effects have been shown to increase task completion time and hinder learning. BlockXR applies projected augmented reality and computer vision to provide users with tangible interaction for programming and feedback in the same plane. A comparative study with a GUI-based system determined that BlockXR scored significantly higher in user experience scores of Attractiveness, Stimulation, and Novelty and achieved comparable usability scores. In this work, we describe the system, quantitative and qualitative feedback from our study.