New Demo 3!

New update for the demo, featuring some new content. 

Content 

• New Character: Spike the Cactus 
• New Weapon: Flamethrower, spit flames at enemies and press down while attacking to launch yourself upwards
• New Layout for ratty's crossing, featuring moving platforms. 
• New Boss: Ferrous Ferret, A prototype of our boss we plan on fleshing out later down the line