@ Feared : "The world is a harsh place" - you said it man. So stop crying and master your skills. Why don't you complain: "Ohh. Playing Quake online sucks. I always get killed." ?
There is a <Restart Mission> button btw.. So if you suck, restart.. And do it until you stop sucking at the game.
To summarize, yes, the world is a harsh place, indeed. Learn how to survive
"You need to add more enemys, puzzles, power-ups and variation to each of these things."
Oh, I am sorry, I forgot to consult with you on how should my game look and feel like.
If you want puzzles, play Hexen. SS was never intended to have any kind of puzzles.
"..he would not learn or understand what he did wrong with his project.."
And how is that determined? Just because out of 31k people who downloaded the game and liked it, 100 people don't like it, doesn't mean something wrong with the game. That's how it it. I can not please all people. And practice shows that as soon as developer tries pleasing masses, the project fails.