Idk if it's intentional, but there is cheese in level 10. The platforms in the middle of the map are skippable if u go through the right side. Maybe the one-ways (idk if you call them like that, i'm referring to the blocks that push you, that appear later in the game) could be a solution...
I got the true ending for the first time playing and I don't know what the normal ending is like. I actually don't want to replay the whole game as well. Could someone please tell me how the normal ending is? But anyways 5/5 game. Flash games aren't dead!!! :D