openHV is such a horrible game. your units default to doing nothing when attacked. You barely know what is being attacked. This game is from the 80s and should just stay there.
From what I've read HV originally aimed to add things like supply lines, terrain heights, deformable terrain, and "player created landscapes". Since the original was cancelled and many of its ideas implemented elsewhere, this newer fan effort may not appear as innovative as the OG could've been.