Great game. I played on stream if you want real-time feedback. I know there's limited art, but the time and attention you spent on the sentry gun is appreciated. That bad boy looks great and the different animations for it are really smooth and satisfying to watch. I left a lot of feedback in the stream, but my main critique would be to put in some sort of cooldown timer or have to use a resource to place the guns to prevent me from spamming them and be more intentional with my decisions.
To be fair, this is just a concept entry and you've probably thought of a bunch of different things to implement and this was still a blast to play. So much fun, that I did another run through when I froze on the blue circle thinking the game froze between room transitions, because I was hoping to check out more levels. That's a great sign that you've made something fun and unique. Awesome work. Great entry.