This is going to sound so strange, but the inspiration was this false? memory I have of an arcade game just like this. But I don't know what it's called or if it even exists. I tried doing a bunch of searching but I didn't find what I remember? Anyway, I just kept building and this is what came out!
I hope you enjoy it! I have some great memories of Rampage, maybe some of that is part of this memory I have!