So let me start off by saying I really like the concept, the artwork, and the music. Based on what others have said, it sounds like the game should work well. But, for some reason, for me the controls are buggy. I have to spam the attack button and it sometimes works, but mostly doesn't. I looked at some of your other games, and realized I had similar issues with your game Roboto. In that game, the jump button worked very infrequently for me, and I believe one control didn't work at all. There has to be something in your build that my computer just doesn't agree with.
I was able to gather the first key, but I haven't been able to get any others, and I believe I must be experiencing another glitch. There are two houses with animals running on top of them. I assume this is not supposed to happen, but I could be wrong. I've attached a gif of what I'm seeing.