Five stars for the woodpecker and more =)))))))))))))))

Overall not bad. Now, I'm not Lithuanian, so I won't dig at the particular styles of humor or where the jokes might've come from... It's a cartoon, not a DaVinci. (Of course, if it was a Picasso, you'd be missing an ear, and probably too drunk to operate a PC...) XD
What I might suggest, considering the current audience and appetite for animations demonstrated on YouTube, is that you would be well advised to break this down a little more. Most shorts enjoyed online are around 3-5 minutes, and that's mostly because it's always REALLY easy to justify another 3 minutes. When you get to 5 or 6 (somewhere) as an audience you start to get more serious about just how much time you're going to spend for the next series of sight-gags and silliness. Collections can always be qualified for a little longer, but you can find a much easier start (and more receptive viewers) with the shorter sets in the beginning.
The art style is descriptive enough to get the point across, so with some attention to story qualities, you should carry on handily. Don't let haters convince you to throw that away for the "anime" styles or something else for "better animation"... All you need ever work on there is a little more animating... drawing more images to let things happen like legs moving in walking cycles and stuff. It's okay to take time for that to become important to you before you sweat it, but if you want a good visual "tripping gag" to work out, you kind of need to see the walking happen...
There are other details, and you're clearly not blind, so you can freely prioritize on that. That's actually an interesting aspect of animating that not so many animators really talk about. Priorities of animating details for when they count in the story and why... Might be worth something if you care to do an instructional type thing.
Another good idea for you to bring out, since you're interested in sharing work with the world is stuff from Lithuanian culture. I don't know any particularly Lithuanian folk-tales, legends, boogey-men... Do Lithuanian parents tell their kids about boogey-men who hunt naughty kids after dark? It might be really like someone else's ideas of a boogey-man (or even a demon)... if you believe in that sort of thing... or if you even like to tell about it.
Anyways, it was pretty good, and I hope you consider posting more. Don't forget, there's only five of those stars up there, so it's not a bad score... ;)