This is a very cool concept, but the game design can definitely be improved, I was confused until I realised there's a day/night cycle, you send units in die, fight the mirrored versions at night.
The music was a good cue to what was happening but I think it could have been better indicated that there is the day/night cycle where you send units in the day and fight mirrored units at night.
Another thing is there's no feedback for hitting enemies, either a flash and SFX when you hit, or simply just a health bar that just shows up to show you're actually damaging. I got so stressed out rapidly clicking the enemies because I had no idea how much health they had and how many hits it would take to kill them.
Some bugs I encountered:
- the sun/moon are rendered on top of the mountains?.
- you can lock yourself by using all money on upgrades instead of sending units, as there is no way to passively earn money, I got stuck like this.