I really liked the idea as it felt like a tower defense meets a shooter puzzler like experience I just found it really easy to die and not fast enough to repair the parts that were damaged. Also, not being able to protect all sides of the main platform that needs to be protected is something I recommended reviewing because a few times I was shot down almost instantly without having enough time to barricade myself.
Having said that, I really liked this entry and it has great potential that with a little refinement and balancing could make a really fun game maybe even a great mobile experience. Great job!