Construct originally started out as a 2D game engine. However over time it has gained a range of 3D features. This tutorial covers the available 3D features and...
"Use another layer to display the text, and set the layer render to 2d."
Go to the "Layers" window, select the layer, and on the left side under "Properties" you can apply 3d or 2d rendering to the layer. So you can make your HUD without any problems.