I'm glad you like it :) Thank you for taking the time to write this post!
The original plan was to first port the game and then slowly add new content over time, but other projects came up and progress stopped. There are, however, 2 new karts that are almost finished and a few new maps that are in the planning stages (me and some friends started making them a few years ago). I've recently gotten a job and might have some free time to do totally non-profitable work in the coming months, messages like this makes me want to start working on this again :)