Looks like you're making a game then. Talk him into descoping the prototype to something that will work with scratch. Begin laying out the game, let him kno

Looks like you're making a game then. Talk him into descoping the prototype to something that will work with scratch. Begin laying out the game, let him know the artwork and sound you need. Let him look over your shoulder, you will end up doing most of the work though. Invite him to any major design decisions