Well for starters.
Your using paragraph spacing and bolding for your first introduction. There is a lack of capitilization at the beginning of each sentance. You using the word, "tut" not tutorial.
Some tutorial types work better with an image at the beggining that represents a final work. A Radar tutorial would suit this. Am I making a mini radar int he corner, or am I making a full screen radar. Adding this tot he description with a pic would be super usefull.
When you section off, the description paragraph should be below the headline, not before it.
layers <=== the size here is fine.
Start with need two layers with the proper paralex. <== should be below, not above.
Also add a description how the components work. While I can easily infer that radar paralax and it's meaning. You should always assume the reader knows less than you. It's easy to write with the idea taht all readers know as much as you, but then you wouldn't need the tutorial would you :D
If you need to use a showing for Event/Actions use an image. Text representations are terrible.
if a section is particulary complex. Show your image, then a step by step by step walk thru
Capitalize your sections too. It looks strange to see the guide jump from Overview, then everything else to lowercase.