1. A system configured to link token detection at a single computing platform with a user identification to effectuate modifications in virtual space instances presented via multiple computing platforms, the system comprising one or more processors configured to execute computer program modules, the computer program modules comprising: a user module configured to manage user identifications associated with users of the system, the user identifications including a first user identification associated with a first user; a space module configured to implement instances of a virtual space to determine views of the virtual space, the instances of the virtual space including a first instance and a second instance, both the first instance and the second instance being associated with the first user identification, the first instance being configured for presentation via a first computing platform, the second instance being configured for presentation via a second computing platform; a token detection module configured to detect tokens based on signals received from a token reader, the token reader being communicatively coupled with the first computing platform, a given token being a standalone physical object, the tokens including a first token, the first token being detectable based on a first signal conveying information associated with the first token; a user ID linking module configured to associate detection of individual tokens with individual user identifications, detection of the first token being associated with the first user identification responsive to the first signal being received from the token reader communicatively coupled with the first computing platform; and a space modification module configured to effectuate modifications in the virtual space responsive to individual tokens being detected, the modifications including a first modification configured to be made responsive to the association between the detection of the first token and the first user identification, the first modification being observable in both the first instance via the first computing platform and the second instance via the second computing platform, the first modification including one or more of (1) a modification to a first character, (2) a modification to a first virtual item, or (3) a modification to one or more aspects of the virtual space.