[WEB][2007-2011] 2D platformer where you play as a cow - one jump that still haunts me to this day.

Platform:

Web browser / online game. I played it on the Polish website gierkionline.pl around 2007–2011, I strongly remember an Adobe/Macromedia Shockwave loading screen, so I believe it was a Shockwave game rather than a Flash game.

Genre:

Very simple 2D platformer. You played as a normal cow and jumped across horizontal grey platforms. There was no combat and, as far as I remember, no enemies at all. The gameplay was basically just movement and jumping.

Estimated year of release:

I played it around 2007–2011. At the time it felt like a relatively new game, but I have no idea when it was actually released. It could have been older.

Graphics/art style:

Very simple 2D graphics with very little detail. I remember a blue background and simple grey horizontal platforms.
The cow looked like a normal cow on four legs, rather than a humanoid or heavily cartoonized character.
The graphics seemed somewhat crude, possibly like a small/indie game made by one person or a very small team. Despite the simple graphics, I remember the movement feeling fairly smooth and pleasant.

Notable characters:

The only character I remember was the cow. I don't remember any enemies, NPCs, or other characters.

Notable gameplay mechanics:

You controlled the cow with the keyboard and jumped from platform to platform.

The one thing I remember extremely clearly is a particular jump that I could never figure out.

After playing for a few minutes, I reached a section where I had to jump upward from one horizontal platform to another platform directly above it. The spacing seemed completely wrong, the upper platform seemed too close vertically / there didn't seem to be enough room for the cow to make the jump.

Something roughly like this:

──────

↑

🐄
──────

I tried this jump over and over as a kid, but I could never get past it.

To this day I genuinely don't know whether:

the jump was actually possible and I was simply too young to figure out the correct technique,

there was some mechanic I didn't understand,

or the level was actually broken / the jump was impossible.

Other details:

I searched for it several times, including Wayback Machine and Flashpoint, and also looked through games with "cow" in the title, but I haven't found it.

It was NOT:

Super Cow

Mooo!

Cow and Chicken

The Way of the Exploding Cow

a cow milking game