I made a new update of the game where this problem should be solved. I'm not sure if you can download the new version and paste in the old safe files in the save folder, but I hope we can find a way to recover your progress. How long into the game did you come if I may ask?
Hey! Just wanted to say thanks for the speedy hotfix, unfortunately it seems I'm not able to get the new version to recognize any of the old versions saves, but it seems to be working just fine with its own save.
As for how far I got, I made it to the first abandoned town on the surface. I had just pushed a boulder that connected to the beginning of the town and the local save point, so I saved there and called it a day. I think I should be able to get back there in about an hour if i rush through everything.
No problems! Just hit me back if you find anything else :)
Okay good not so much time was lost, after that moment the game will slowly start to "open up". Btw... If you ever make it to the last boss you will find that he doesn't have alot of HP. So the end fight will be over way sooner for you than it should be. He has around 10% of the HP he should have. (I nerfed him when I was playtesting) This is fixed now but the people who downloaded the game yesterday will have an easier time with him.
(Atleast this is nothing game breaking, and if you only play for the story this is even good news ^^ )
Hey! I must've deleted more than I should. Go ahead and try download the game again in about 15 min, the tilesets should no longer be missing. The good news is that you should be able to continue where you left of this time. If you save the "www folder" you currently have and replace it with the empty one that comes with the zipfile your save slots should be transfered. Once again thank you for notifying me :D