Thanks, that makes me very happy to hear!
Yes the levels in the android version can also be used on your PC.
You can download the android levels here: https://drive.google.com/open?id=19gPPRYcJsHHj_clFya9ptDOEOvZ61s4F
(All levels are fully compatible between the android and desktop version. If you wish to copy levels between the different versions you can find more information in the user manual).
As you may know, there are some extra levels available as DLC here: https://fpv-freerider.itch.io/fpv-freerider-recharged-custom-level-pack
At the moment I don't really have any more levels that are ready for release, but if you search around a bit you might find some levels that other users have created. For example in this RCGroups thread. I also would like to encourage you to create your own levels in the Levels Editor, or simply make personal changes/additions to the existing ones - it's not hard once you get the hang of it, it can actually be quite fun :)