Nice execution! A mouse-only, physics-based wave defense seems tricky to pull off, but it was surprisingly intuitive to control.
One thing that was a bit unclear was the mace changing color when the base takes damage: at first, I thought this meant my mace was sometimes vulnerable, and it was only later that I figured out what had happened. (Though that in itself could be an interesting idea.)
Overall smashing the mace through enemies was intuitive and fun.