Last version 0.42_beta, very raw. Why not aviable old map? 0.4 is prototype of multiplayer. So it contain only simple track for chalenge. 0.42 have also prototype of the track constructor. You can download old version. Press "Install game", and next "download direct". This is zipped old 0.3 version.
Man this game is so awesome and I can't wait until its fully released because it will be insane, haha. Anyway, because its in beta it does have its bugs and the map is limited which is why its only a 9, but that is to expected anyway but, Congratulations on making one of my favorite PC games of all time and I hope you continue your awesome work in the future.