Regardless of whether he made it in a week or not, the criticism by the OP was constructive. Just being nice and saying that "this is fantastic", wouldn't help

Regardless of whether he made it in a week or not, the criticism by the OP was constructive. Just being nice and saying that "this is fantastic", wouldn't help the developer learn either. *Input lag is something Carmack et al. keep hammering home for game developers.