Your Levels are fairly Acceptable, can you do Urban Environments, for Royalty Based Compensation?
I have a Design Document redacted in some parts, but released her e on the Epic Forums, for an Urban Themed Game, basically involving restructuring of 3d modelled assets (fully detailed buildings and streets, they just need to be placed and lit inside Unreal Ed 4…) Hopefully you have SpeedTree 
Royalties will be paid based upon workload and dedication, as we strive to reach a Complete Release, see this Topic here:
https://forums.unrealengine.com/comm…-2d-3d-artists