since you've said you're going to add actual graphics later i won't talk about that
using 3D graphics for backgrounds and 2D for characters is weird but fine, using hexes is weird but fine, the pillars would look better if they were shorter
selecting another unit when you already have a unit selected could be simpler and the buttons are too far away from the actual hex after you click on it, or maybe the problem is that the buttons are too big, the gameplay is very simplistic and just picking lots of cheap units seems to be the best strategy, also i don't know if bushes give cover or a DEF bonus or whatever but it looks like they should
if you just pass the turn without doing anything you're unable to make any moves during your next turn, idk why
i'd try and differentiate units more, all four factions played very similarly, but it was the game i had the most fun playing this demo day so gj