Really interesting game. You absolutely nailed the art style, and the fact that it's a complete game that only ever uses a single key is incredibly impressive.
My only issues with it is that some of the UI is a bit fast paced and cluttered, and I don't really have time to process what's going on. And there were some occasions where the auto targeting mechanic was more frustrating than fun, which isn't ideal, but also understandable given that this was made in a month and there couldn't have been much time for testing/debugging.