Smashing!

I really should have posted these when I finished them but this weekend has been hectic. I'm actually working on the buzz saw version of this at the moment which will strike down and spin for a while, taking out a lane while it does. The piston would be a relatively simple attack to dodge on its own but when combined with others it could become quite challenging.
As far as other concepts go with Soul Furnace, I'm considering alternative ways we can utilize the souls collected from the level prior. One idea in particular that I like is the player is able to move on to the boss once they have collected 100 souls. These souls could then become the player's health for the boss encounter. Each hit the boss delivers deals damage that removes a certain amount of souls that the player cannot recover. Once they are out of souls they have to restart the level. Whether or not souls appear during the boss encounter is something we'd have to realise through playtesting.