Crafting menu won't let user page through the different projectiles after unlocking new ones (possible that the crafting interface isn't being added, or that the page buttons aren't being updated to become active). Occurs when a user w/ less than 3 projectiles unlocked unlocks a new projectile that requires a new page in the crafting menu.
After pressing & holding "Craft" in the crafting menu, and materials run out, user can purchase new materials. Upon re-entering the crafting menu, another projectile is crafted of the type that was being held down.
When a player unlocks a new projectile after completing a level, a crafting interface doesn't appear in the Crafting menu to allow them to make the projectile until they sign out and sign back in.