I definitely tried to ease players in. After about level 5 is where it really starts to pick up in my opinion. I didn't want to tutorialize too much too quickly and thus split it up a bit. I'll look at shrinking it down when I go to make more levels!
The control scheme is the #1 complaint I've seen! I've actually already fixed the spawning UX bit. I've heard a couple others mention right click to rotate as well and so I'm going to look into changing that and then adding a new way to delete as well! And then swapping has been added on the back-end as well!
I appreciate your feedback! Every bit helps to make it even better than it is!