pls answer

So I can't find a way to finish levels 5 or 10 in single person mode. When I "complete" a level by touching the flag it greys out and then I need to press ESC to get to the main menu and select the next level I unlocked. This is fine for going through the game but there is not trigger for the achievements for completing levels 5 and 10. I even got all the coins on these levels in case that was what was intended but that didn't work either. So currently it is only possible to get 3/5 achievements....

How in the world you thought this game will be interesting for someone ? it's not 90's - wake up.