Quite nice, very well polished, and great presentation. Always nice to see solo devs, especially when it's a really competent game all around like this, lol.
I feel like the controls and actual combat still feel a little bare, though. Not everything needs to have four different resource gauges and complex mechanics, but it starts off quite slow and the bosses are fairly limited in what they can do. Some differentiation in the upgrades besides "walking and attacking faster", and possibly evolving patterns for the bosses, would really do wonders here!