Good game! It was too slow paced for my taste but still good!
When I tried selecting multiple units by clicking and draging the selection area suddenly stops when it's about to hit a unit.
Also (I don't know if this was a me problem) it wasn't very clear about how to attack the enemies, I would click on them and my units will move towards that hex and then stop and take like two or three hits from the enemies and then they react.
If you keep updating this project it could be a very fun level based RTS, maybe introducing a few hazards that the player needs to build around or something like that. I could also see it as a turn based RTS kinda like Civ.
Anyway, you did a good job, be proud! :D