Loved the art design, but the communication and feedback between animation and mechanics could use some work.
Hit feedback is a must, both when enemies hit you and when you hit enemies.
And I wasn't sure if I could kill the flies before they hurt me. At first I thought you just had to duck under them, but the third one hurt me while I was ducking underneath it.
I also got the rat down to 0, I think, since it stopped going down after attacks, and I eventually died because it didn't die. lol