How do I make this work

I want to make a sort of like super smash bros but I dont now how to make it so that they have to use the up arrow and special to use a recovery any Ideas

I’m already making a smash bro

Can I help you with it?

Ok sounds great have any ideas of characters and stuff or maps

Reimu from the Touhou Project, I close my case

let me help as well as im a pixleartist

Sorry, but, I already got that covered.