Yeah, thank you...
Actually, I quite terrible at pixel art. I've tried it couple of times a log time ago. I still think I should have just make paint all the graphics in Krita, instead of using almost unfamiliar tools. But at the same time, that's what I can say about Lua and Love2D, so let's call as part of the challenge.
Still, I'm surprised that it doesn't even look as bad as I was afraid in the beginning.