I think I discover a bug. I'm not sure if it's my save file or it's game. I did played yesterday with log in. I did played for hours and refresh my browser to check if it is saved. It was saved. Then next day, I came here to play, but I lost everything that I had played from yesterday. It's like start over but only one thing that I haven't lost is my trophy. Even I noticed that it said that I completed challenge from challenge mode. I checked there and it was locked, which that means I have to unlock it.... Is it bug or what? I tried refresh and everything but still couldn't get it back from yesterday. Only trophy... ): However, I say it is very fun game I ever played so I'll rate this game as 5. Great works, developer. But please fix it as necessary.