Starting with these Platformer tutorials:
Pix Engine release V1.0
https://drive.google.com/file/d/1wXmV5_Hd2HWM7sOKuZhBhpWWI1DTuz2a/view?usp=sharing
Video Tutorial #1: Understanding the Engine
Video Tutorial #2: Different kinds of Platforms
Video Tutorial #3: Doors and Levels