I killed the boss with 25 HP remaining. :)
You're right. Side scrollers are not easier than RPG's. They're actually one of the hardest game types to code. If you're looking for easy then go for point and click adventures.
I was expecting something totally crappy, but you've managed to dish out a pretty solid and incredibly ambitious game. The ceiling climbing and stuff makes it not just another platformer. Also I like steam punk.