I have only played a few hours now, just entered the city phase. So far, it hasn't been a dissapointment to me.
The first phase is cute (and so far has had the best graphics, it was a bit of a disappointment that the further i got, the quality of the graphics seemed to go down).
The creature phase did not feel like much fun, until I realized that it should definitely not be seen on its own; it's the creature *generator* that is the game here, and the gameplay of the phase itself is merely to show off (to yourself) how crazy/cool/scary/funny your little beast is becoming as you fight or befriend other creatures, change your creature, and repeat. The mechanics and 'missions' can definitely use some work though, but the focus and enjoyment are mostly in the builder itself.
Then came tribal. There seem to be a lot of things missing here, why only a select number of buildings? Why can't we make these on our own (like in the next phase)? Overwhelming an enemy is a bit fun, but kind of the same every time. It could be that i'm not a big RTS fan, but this phase really feels incomplete.
I have only just entered the civilization phase, and got totally beaten (everybody declared war on me almost instantly when i took over a neighbouring city with my only 3 tanks, laughing like an evil overlord, but not for long), so i can't say too much about it. At first you get to design your tanks and city hall, for which I took a bit of time; An evil overlord has to have an evil-looking castle, right? But when you are asked to design more buildings it's a bit too much to do at once. Again, the focus is probably on the creation, but I haven't seen how these buildings actually affect gameplay. If at all. Luckily, as far as the vehicles go, it seems to be more like the creature phase. But again, I haven't played this phase for long, and time will tell for me.
Overall, I am having fun with it, and I am certainly not disappointed (yet). I'm not sure how long the game stays fun, and if it shouldn't be priced less. Especially when you just know that there's gonna be a lot of expansion packs coming, which can be a good or bad thing depending on your point of view.
There really is a lot of room for expansion, and sometimes it feels like stuff is left out intentionally for that. Yes Tribal Phase I Am Looking At You.
I'd give it a 7 out of 10 so far.