First off, since you have made some changes, how big is your actuall .swf file? Don't know if it's just here, but it took a looong time to load your game, so for opitimizing purposes i would recommend to use "Debug->Game->Cleanup Unused Files" from within stencyl, and also run pngoo on all of your images(To reduce file size), if you haven't done that yet.
The game itself is just another "flappy bird", but i assumed that this was mostly for learning purposes.
For me, the "story" doesn't matter in a game like this (Since there is basically no end, and no "winning"). And i didn't get the whole floating head thing (Maybe because i skipped the last parts of the story/intro).
For the gameplay part, it needs a lot of optimizing. At least at my computer (High-end), it got low framerate, all the time. Also the doublejump feature was just really anoying, as it felt as it was random when it double jumped or single jumped. And the double jump was like 3 times higher than the singel jump. I think that you're better off with just using single jump.
It would also be better (as someone else suggested) to allow restarts from the space button. Just use the same boolean as you use for the "Game over" to popup, and add a "If boolean =true" "If space was pressed" "Reload scene".
But that's just my 2 cents.
Btw, liked some of the graphics you have used, and it's a pretty decent game to be your first! Keep up the good work