Heap VR is a block stacking experience with multiple game mode.
Free Build Mode - In this mode blocks you place snap into place when you set them down. You can stack blocks left/right/above/below one another. This is just a run mode where you can freely build whatever you feel like.
Unlimited Stack Mode - In this mode you place blocks one on top of the other, while you stand on a platform that rises over time around it. The goal is stack as many blocks as you can until your tower of blocks collapses or gets too far below you.