Fireball-Mario Willy won´t meet Angry Birds. 🙂 I think this is a great idea! I´d suggest that please don´t change anything from your idea yet, as the idea is great, just ask help for the level design, sure there will be some people who can help. 🙂 It´s also possible to make a version without platform shooting, that the other side of the platforms will start to dive, when you step too far. But also it should be possible (for fun!) to run back before platform dives too far (just like in slapstick movies!) and Willy´s weight will make the platform to rise again to it´s original balance. If the player will not run back to the opposite direction the platform will quickly collapse. I hope you understood what I was trying to describe. 🙂
I will try your pre-pre-pre-game later.