This tutorial goes over using Stencyl 2.0 to make a basic platformer. There are other tutorials as well (see below for links).
As always, 100% of revenue goes to charity. Thank you.

Instructions

Click/Enter/Space to advance a slide
Shift + Click/Enter/Space to go back a slide
Hover over the bottom bar to preview other sides, clicking to change to that slide.
Hold Ctrl + Click on a link (blue text) to go to the site.
Arrows to move in the demo at the end.