I liked the visuals very much and I enjoyed that you can hit more than one enemies with the sword.
The attack cooldown though is way too much, especially if they need to be hit three times and they blend with each other so you lose or can no longer reach your original target...
I only got once a chance to upgrade but was clicking somewhere and therefore was gone before I knew it. I kept playing and collecting the thingies, but I never got another one.
The middle button to change weapons took so long that I thought it was random to accept the click, and it also changed to the slots having nothing. So I was running around for a long time until it succeeded a full circle and reached the sword again.