So many cool aspects to this implementation. The random generation, the credit scroll with all the interesting item names. I liked the frenzied dash to get as many items as you could. I didn't really experiment much with the "defense" using the space, but the tutorial screens were a really really nice touch. I'm glad you had time to add that in.
I imagine you looking at the huge asset pack and thinking, "Why not use it all?" Haha. My only suggestion is to make the grass a slightly different tone to the trees. It was hard to tell them apart at times, and only one of them was passable :)