This game, looks pretty good, took a few time to make and quite creative, but there would be a lot of improvements to the games, like adding more characters to be (Not Only a Clefable), and to change the Clefairy's color, because it originally pink, not green, and yes I understand the game is called Pokemon Green, but there could be another main characters...
The game is based on Pokemon, why is Clefairy the only pokemon on the game, there are different creatures which are not Pokemon at all...

Graphics are good, pixels as usual, but the sprites and background look perfect, but Clefairy could change color...

Sound? There was no sound. There should be atleast some music in the game, it makes it boring...

Addictiveness, well. Not so addicting TO ME. I never found these kind of games addicting or fun in any particular way... 

Story, there's no story to be honest... You just play a green clefairy, run around, jump around, kill creatures, collect bonus items, and you win. No levels.

Depth, same as 'Story', its short, and only has 1 level.

Difficulty, to be honest its not easy, and not hard... But a bit annoying, since it takes a while to get used to the controls...

You need to explain yourself more. When you say stuff like "it's not addicting to me" You need to explain why it's not addicting. What's so not addicting about it? Don't just say, "it's good" "it's perfect" "not easy, not hard". Explain youself.

play4fun : Cba, sorry.

Likki : Oh you don't have to apologize to me. I'm trying to help you make better reviews. Just keep going learn from everyone, and you'll get better.

Likki : Nice review. Like play4fun said you should explain yourself more and maybe you should make your reviews a little longer but overall this is a good review. Keep up the good work and have a nice day.