Hey your work has good potential, just that the material pack needs refinement. I am new to Unreal so I am not 100% sure how you would proceed with refinement of your material pack, I’m coming from Unity 4/5.
Maybe have this thread be still in Marketplace but under [WIP] (Work In Progress). I don’t think it will take 2 years but maybe 3-6 months to get things improved, don’t rush, since Unreal Marketplace quality is very high.