I like how easy it was to tell your units from the opposing team's by the clear difference in the color band. However, I realize now while writing that, there still could be a way to improve it. In case someone is color blind it may also be a good idea to have a pattern or shape to distinguish them more clearly. Also, the color is only towards the bottom of the unit. It was pretty obvious to me, but I wonder if a more prominent difference such as a difference in shapes / patterns or even a substantial difference in the design between enemy and friendly units could help improve it.
To me it was fine and it looked very clear, but if you were to continue to work on it after the jam that could be one area to consider.
Another way to improve it (unless I missed it) is it may be useful to be able to heal in exchange for gold, either at the shop or even one of the other buildings.
The custom 3d art looks great and matches very well with the purchased assets, and the gameplay works well and is very fun, nice job on this game!