Making a playable game in a week is an accomplishment. It's a hard thing to do. That's why these are not easy. That was actually my goal for this game jam myself (also solo), after previous ones where I was overambitious with my goals and BARELY got something out the door.
When giving reviews, I try to not just say "Good job." There's not much content in that review, and there's plenty of reviews like that. Critical comments foster growth. That's my philosophy.