I liked it very much! At a certain point it let me put a cannon right over the UI of where to drag weapons by mistake even while showing red so I could drag no more weapons out. But with even just what I had I might have gotten it in a way where no enemies could pass anymore even with using what I had (though it took a few tries to get it so well like that). I also noticed it's working better in the web build, in the desktop build the drag and drop does not even work. Overall I think you did a great job on this game!