yes, the interface lacks basic tool tips for what units are produced by which buildings and at which building upgrade level. the game only tells you when a new one is available and you have to remember each one. if you are mentally challenged you may have a hard time with it.From the video I couldn't really tell what is going on.
Units move around and you give them stuff (?).
But yeah.. the whole "star rated levels" thing gave it away as mobile inspired - which is funny as the game isn't available on mobile.
Which can be fun every now and then (like some tower defense games), but the game definitely isn't too deep.
Funny enough, from the reviews it seems that even what is there is explained terribly or not at all