Hey, thank you for responding Tank and eXpl0it3r!
Your goal should be making the game polished and fun to play. Distribution is what follows thereafter. At first you need a good product, then you take care of marketing.
Of course it's worth working more on it — if that's what you want. Don't see releasing on Stream as the ultimate goal, it's just one form of distribution and marketing that you may use after you already made a fun game to play.
You are right of course, the first goal should be to make a fun game that I feel confident about before releasing it. But I was simply frustrated working on it for so long without having anyone to share it with.
I learned C++ by myself and have zero experience, which resulted in a code mess... I would have to redo most of it from the start and so I was hoping to see if people would be interested before doing that.
The few people I showed it to thought it's a great idea, but they all knew the original "Achtung, die Kurve!" and know how much fun it can be with local multiplayer. But hoping for a sudden hype from nostalgic people was probably wrong
itch.io can get in the multiple of hundred games a day that get uploaded. Just uploading it and expecting people to see, download and play it, is a wrong expectation to have. 
Yes, that's true, I didn't expect it to get much attention, but I was hoping for more than 3 downloads and 0 comments... xD But growing some kind of community first seems really hard / impossible alone
I do agree with Tank, that the game needs some polish, especially in the graphics department. Plain colors with high contrasts isn't considered very pleasing to the eyes. Which then leads to people just not getting interested enough to click on the thumbnail among all the other games if it does come up on someone's list.
Hmm I didn't see the graphics as a concern, I only wanted it to look like the original. There is not really much I could do, as it needs pixel-perfect collision, so I have to draw to a sf::Image at the same time that is used for the collision detection (Pixels in front not transparent -> collision). Implementing that was already difficult enough (as a beginner).
I showed it to a friend who showed me the original "Achtung, die Kurve!" back in school and he loved it, because he knew it's supposed to look like that. I guess I was hoping for other people with nostalgia for it.
So, I guess it's better if I work on easier projects first, so I can show something worth sharing before getting frustrated, right? I do have many other ideas
