How do i add collisions to a brick? (Blender)

[Insert Name Here²]

In blender while not being in edit mode, select all the objects in there (like the spike and collision, not the lamp / camera / etc), Press CTRL and A at the same time, and click location, do it again and do rotation, do it again and do scale and re export

see if that fixes it

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[yeTenszi]

ok so the brick slightly floats and also if i add an onplayertouch event only the bottom part works not the spike.