momoiro-kun: I'd say, the general concept of what is depicted isn't too bad, the main problem is the graphics.
Assuming Rouge was drawn from scratch, she looks the best in the picture. Cream could use more effort than this and the male character's visuals are too different. Consistency is important, as characters in the same scene should be done in at least a similar style. Linework on Cream could also be more consistent.
All in all, the artist has at least some potential in my opinion, but practice is necessary in his case.
Assuming Rouge was drawn from scratch, she looks the best in the picture. Cream could use more effort than this and the male character's visuals are too different. Consistency is important, as characters in the same scene should be done in at least a similar style. Linework on Cream could also be more consistent.
All in all, the artist has at least some potential in my opinion, but practice is necessary in his case.