2D platform engine in unity part 10 - Big level

Today, with the platforms finally fixed, I started expanding the level. I’m not sure how Unity optimizes what goes on behind the scenes, so the only way to figure out is to try it out.
Also, it’s a good way to find out what features I feel like I’m missing. Like pick-ups, or enemies that or obstacles that will hurt you.
It also gives me some room to really try out the features I already got. Like the treadmills for example.