well its definatly worth continuing!
i like the look very much
what i like:
-depth of field of foreground and background
-moon surface
just some thoughts:
-give the moon monkey more details for example a helmet, an air-breathing-device, etc
-it was already mentioned that the level is very empty. i guess u will add enemies and items in it and a nice user interface with health bar and points then it will be just perfect.
-i would add a star-background for the sky, maybe with a little earth planet, so it's clear that u are on the moon.
-maybe add a little particle effect by the feet when the monkey is walking on the moon surface and the moon-dust gets blown in the air.
cheers
sinnlos