I changed a lot

no it already is pretty big 

I'll try something like that, I might have to make the whole thing bigger though

looks better...maybe break up the monotony of the grass by adding some diffrent tiles, ..stones, piles of grass etc

too simple... no depth and everything.... the grass looks just like green noise and uses like 30 tones!!!... thats outrageous.... the colors are too saturated and therefore look unnaturel... a lot of room for improvement

heres an edit    >>CLICK<< 

steps: original version > reduced to 7 colors > grass tiles > changed palette > added sky gradient  > dithered sky > added background