It would have be nice with a level skip - I had to leave for a few hours and when I came back all progress was gone :/, but I will replay to play the last levels.
Your progress shouldn't be lost - if you go to the main menu there's a 'continue' option, or a level skip option to any level you've previously completed (even on webgl this should work unless you're in incognito mode and wiping the saved data!).
