Thank you very much! Glad you liked our game!
We had a lot of fun writing and recording the voice lines so it's awesome to see you enjoyed them! :D
Yeah, we were made aware of that bug shortly after the deadline, we wrote the "fix" in the game's description but I can understand if you did not see it. When that happens, simply reload the webpage, run the game and the main menu should have a "continue" button to take you right back to the level you were on. And you're correct, the 4th level with the 3 ghosts is, indeed, the last one ;)