Heyyy, nice music! XD
It reminds me pleasantly of the Chip N' Dale Rescue Rangers game for the NES, which had 2-player co-op and the option to use each other as steps or weapons. Say, a 2-payer version of this would be incredible! (I'm also thinking of Bubble Bobble.)
I hoped the friendship would last. But I did start to notice that the dragon was being left behind all the time! You and your sassy twist endings! ;) What am I saying, I made a game about Noah's Ark where Noah dies in some versions of the story!
Really fantastic job. The game is fun, the puzzles are tricky, the graphics are great. Well done! Bien joué!