Really nice game. I like the character design and the sound effect when walking . I did notice tiling issues on your landscape texture . You can a distance blend with far texture that is less detailed and near texture that is more detailed and you plug to the texture sample uv this will help with the tiling .
One tool that i recomend using for langscape is gaea . It is free landscaping tool that can easily generate 3d landscape along with the different layer allowing unreal to blend the texutre really well