Thank you! I appreciate your feedback! To be honest, the original vision for the game was to have different levels that you had to clear, like in Hotline Miami. However, that felt too complicated for the time we had, so we just went with one level and multiple waves instead.
Thank you! We are a team of inexperienced game devs. For some of us this is our first game ever, so we didn't aim for novelty just a working game. I am glad that you liked!