Hello, it's good that you went out to get sources in order to make this simulator, however I'm not sure the resources you went with were necessarily the best. Therefore, I'm going to share a couple of sources I've found to be very reliable so that you can update this game if you plan to.
In that case, the enemies have been squid things since wave 13 (possibly earlier, my head's a bit bluh right now), and I really could use some way to back up my save data like you can do in cookie clicker and racing clicker.