I liked your game a lot!
Everything -graphic wise- was clear and cute. I think you did a great job there. I know that there is some sort of 'rock paper scissors' dynamic between the units, but I would like to have more combat options for mages and archers. Maybe if you add the option to attack from distance I could feel more the difference between units, but maybe it makes them OP.
Overall, a really nice entry, specially from a one dev team.