First of all, I apologize for the bad experience you had.
1. I am looking into the issue where the achievements window overflows the screen right away. I suspect it stems from differences in resolution settings, but I will investigate.
2. I believe the fact that you discovered the click mechanic later—and that the gameplay beyond the starting areas wasn't immediately intuitive—points to a lack of a proper tutorial; I will address this.
3. Most importantly, there is the prestige issue. Again, I apologize for this negative experience. This will be my top priority. Something like this definitely shouldn't have happened, and I can imagine how frustrating it must be. I believe I can resolve it quickly.
Thank you very much for your feedback. It was very important to me; having these errors identified and reported is invaluable.