As my experience, page load time absolutely impacts SEO. Google uses it as a ranking factor, especially for mobile searches. Sites that load slowly tend to have higher bounce rates, which also negatively affects rankings.i wouldnt build your site up for SEO just keep making post .. i would more promote your site in social media simply because they dont manipulate with results.. in some time i made tests with 5 domains with 5 domains only 1 which ranked great into search engine and got proper results 4 of them either if they didint indexed at all or so poor results which i got 0 visitors from Geometry Dash Lite engine.