The creature creator is great, going from cell to space-stage is great, but that's all the fun you'll get out of it.
I got to Space stage after 7-8 hours of gameplay (it's a very easy game, even on difficult mode.) and the first missions were amazing.
The first let down came only when the game started repeating itself. Same pirates attacking my planets, same ecological disasters, "pay me 'x' or it's war" messages, "omg, come rescue us please" messages... Boring, but I wanted to get my progress bar full. I was hopping something amazing would happen.
Eh, not really, no. Second disappointment there.
After this I played a little more just to find that's about it. You can keep exploring until you're bored enough to stop. i got bored pretty fast.
Graphics got a 9/10
Customization is the big star of the game with a 10/10
Sound effects just ruined it 1/10 (Annoying, repetitive, annoying again.)
Music is a 4/10. Not bad enough to get you annoyed like the sound effects and "voice" acting, but not good enough to actually be noticed.