Some of the important pieces of feedback I got were about levels obviously. 

I honestly wouldn't have found anything wrong with them if I hadn't gotten an outsider perspective.

I decided to create better and more compact levels for tutorial purposes cuz the older ones I had were not that great and they were too big for a simple tutorial.

I like how they turned out so far. I'll put out a newer build which contains these new levels very soon. Then I'll move to touching up the older levels.