Hey there, thank you so much for this extensive bug report! :)
The text on the screen is just some debug information for us developers and it can be toggled on and off by pressing the backspace key. However, if you didn't press that key and it became visible anyway, then there's definitely something wrong!
We'll have to discuss how we can solve the issues you found on the Isle of (Broken) Hearts. Thanks for pointing them out to us! And for the loading screen freeze: Do you perhaps still have that save game or did you overwrite it in the meantime?