When you try it out, if you go into options, setting mouse buttons to "2" will make it a bit easier. That enables you to use the left mouse button for one setting, scrollwheel for the other. There are also advanced types of rendering you can enable. It is probably not a good idea, in the case of this game, to pass on the tutorial and it may even be worthwhile to look at some of the user-made tuts on youtube to learn the mechanics a bit better.