Dokipen,
You probably have to message directly. I think Twitter is the best way to get him to review the pull or have someone review it.
also I’d like to say thank you for making a contribution to paper2d. The way we save paper2d is by putting in the work to finish it I think. eventually unreal will return and make paper2d badass but I think as a community we can come together and get what we need now done. we’re all programmers(I suck and am new at it, but I’m willing to learn/try.) so why not? hehe.