Not bad
It's not perfect, since there are still some bugs and it's not complete, but you're definitely onto something big if you just keep it going. The Tutorial section was definitely well done, I have to commend you for that. Fix the walls with the jumping practice section, since for some reason, I jumped through the wall and just fell endlessly.
Maybe add some nice music and a few sounds, fix the bugs and finish it up, and you'll have a winner. Nice job, and keep up the good work.