The controls were a bit difficult, mainly because they would keep opening programs on my computer since it uses so many command keys...! The minerals were required for every upgrade but they didn't seem to be renewable so I wasn't sure what to do once you ran out? The world and drone model were very cute, and I loved the mouth sound effects! I wasn't able to survive long enough to see if you could get past the first upgrade of every facility, sorry if I missed something!