There were initially plans to place temporary interactable which would allow for the path that the enemies took to change. However, I couldnt implement it correctly before the jam which resulted in me having to remove it. Yeah the house just generates money and health if upgraded properly. Will definitely add some new aspects to the game such as new enemy types, more rounds and a progressive difficulty based on the rounds. I do also acknowledge that balancing is an issue which is something I have yet to actually overcome. Anyways, thanks for the feedback.