Hi Dixo! Firstly, thank you for your comments; they mean a lot to me. I'm delighted to hear that you've been enjoying the game.
Unfortunately, I've been making updates to the data structure, which is why your save was lost. Over the past month, I've been working on integrating the game with Google Play (If you're interested in participating in a closed test, please let me know at sapusgames@gmail.com).
This current version is essentially the prototype of my idea. In the future, I'll focus on developing the full version, enhancing visuals, improving the user experience, and adding more content while keeping the core of the game. Therefore, updates to this prototype version may not be frequent, mainly for bug fixes and to release it on the Play Store.
Regarding the difficulty you mentioned, there's still work to be done in terms of balance. The intention is for players to feel the need to farm some stages to progress. And you do can earn gold without completing a stage, thanks to the option of retreat, which grants you experience points and the gold you've collected thus far in that stage. What you don't receive are items and card points, for which you need to defeat the boss. I would be happy to read any more comments or suggestions you may have. Thank you for taking the time to share your thoughts; it's a great source of motivation for me to keep moving forward.