press space while holding anything to map it to the key, when you press the key eric will say the corresponding input If you're interested on adding inputs yourself you're gonna have to go to the "mapke" list and add them there, though i don't think it's all that necessary considering you don't really use the unusual ones in any game lol.
You will find this useful i think if you're a game developer so feel free to use it. you don't have to credit me but it'd be appreciated Note that this itself isn't a game, just a tool for people to use. It'll help you get rid of those ugly default dialog boxes scratch gives you lol in case you wanna go for something stylish