Allthough it looks good for someone who just started, I might as well give you some crisisicm by now ^^
1.) The grass is too dark, look at king kai's planet picture for reference.
2.)Even though it's king kai's planet, it seems quite small. Not not enough fighting space, if you catch my drift.
3.) The top of the house is very angular, from what I remember the house was perfectly round.
4.) The base of the house should not be in a complete straight angle that goes down. It should be a bit more like this " / " instead of " | "
5.) There's still a lot of stuff missing, but I guess you'd figured that out already ^_^
Anyway, just keep working on it, and it should turn out really good