No i couldn't, and neither could most people posting here i'd imagine.
Level design is a *****, most people don't realize how much it takes to design a level well. No really you have no idea.
Then you have programming, again that's seriously bloody hard. Making sure everything works really well and nothing is buggy. Everything has to work together smoothly, you're fine tuning the gameplay here.
Then you have the graphic design. Even SNES graphics are really hard to make without creativity. Then you're getting into character design and creating an atmosphere which can be difficult at times too. Animating too, that's even worse! Especially animating characters facial expressions and stuff.
Scripting well and applying a story is a massive part of most games, i can't comment on that because of my bad english skills but for me this would be hellish xD
Then tons of audio design, sound effects, music and if you dare there's voice acting too.
So i've brushed the surface of game development, i'm sure everyone that said yes is feeling just as confident >;D
Personally i'm hoping to get into programming, but i do a lot of reading into level design too.