@sivricmarijan You're welcome, I'm glad if it helps !
@NanoCake I didn't note any performance impact. I use it in my own platformer, and It's quite light. Calculations to generate your shadows are far to be heavy (as explained in the tutorial. It's nothing but depth simulation after all, your sprites are still flat as hell, no matter the resolution). Any problem at this point would be from your own design and not from the feature itself I think. For instance, if you set a lot of light sources and use a lot of normal maps for some reason (knowing that you normally don't need more than one or two normal maps and don't use more than 3 or 4 light sources for the entire scenery/level...) you will have some problems. But in regular case, which means one single normal map to cover your whole level and some light sources (or maybe even one single light source like a sun or something), I really doubt anything could go wrong.