As was mentioned, having a download-only game is rough. It makes it more effort to play. I did the same, but it was because I decided to do a C# Godot game, and 4.x doesn't do web exports right now. So I've tried to play all the download-only games, as I know what that's like.
I played your game, and I didn't have a problem with the tutorials. In fact the way you did it was retro and I was fine with that. I could not see the coal when I got to that point. I also could not find any more coal anywhere. That made it really hard to play, and I gave up after I died the first time. That was my only issue.