What is your OS and which file did you download?
Me and my programmer aren't getting an error with the Windows file of the game...
1.) I have Windows
2.) I download ReanimatedHeart-1.0-win 04.08.zip
3.) I extract the file
4.) I open ReanimatedHeart-1.0-win folder
5.) I double click the Reanimated Heart icon (Application) with the heart, it loads the game
6.) I click New Game and it opens
If you don't mind, can you follow this step by step and then tell me which part of the process the error appears? And then upload the error on imgur and link it here, if it's possible