Congrats on the submission :)
I love the tower defense formula. I don't know if you guys made the music, but I think it wasn't the most pleasant, so I'm glad there was a button to turn it off. The sound effects were downright terrifying, but quite fun! At first I was overwhelmed because I couldn't read the buildings descriptions and game instructions while the waves came, but I found out you can pause with space bar later.
I had quite some good fun on the first wave! I seemed all powerfull with my destruction sea station, but after the first wave I just lost, and I still don't understand why :(
It was overall fun to play, and I think it can become a really cool game given the needed polish. Well done!