Braveland Trilogy is a fairly solid set of games, simplistic as they may be.  You can adjust the difficulty during the game so you can make it as easy or as difficult as you wish at any time.  While it would have been nice if the games were at least a bit more complex, keep in mind that these are ports of mobile games so the simplicity makes sense here.  Even still, if you want a complex strategy game, you might want to look elsewhere but if you're okay with simple, Braveland Trilogy is worth checking out.