Hi 5ilvara.
For the moment I'm just focusing on smaller tracks to keep the racing quick, allowing for a faster paced game. I will be looking into some form of opponent (simple AI) later in development, but for now it's going to remain as a 'Time Trial' type game until I can find something that will work well for the game.
I have no intention of adding in an Educational aspect purely because that was never what this game was intended to be. If at some point in the future I create a sequel, then this may be something that I will include. But not for this game.
I have considered adding it to Steam, but at the moment it is not near enough to completion to even think about that right now. While steam workshop integration would be awesome and would work really well with my game, I simply don't have the time or resources to learn how to integrate it at that level. I am however looking into the possibility of adding my own custom creator outside of steam entirely, but that isn't at the top of my todo list right now. At the moment I'm just looking at getting rid of bugs and slowly adding more content myself.
I hope to release an update within the next week or 2 with some UI improvements, minor level changes, and bug fixes, so keep an eye out for that!