As is the current trend, I have added online hi-score.

It was quite a hassle to prevent the same score from always being added at the end of the game.
And as always, thinking way too hard to solve it.

The solution is to compare the local hi-score with the online hi-score of course and then count how many times it does not match.
If that is 5x, then add the local hi-score.
If it is less than 5 then not, simple..... after 4 days ;)
Naturally you have to compare it again to see if it fits among the top 5. 

But now I prevent, for example, the hi-score below from disappearing after a second play.

I don't have any new ideas anymore.
So now I'm going to focus on creating Levels.

If anyone has some time, please create a level as well and put it on the commens  with a link, so I can add it. 

Have fun.