I liked it. But it was frustrating that there were only a couple of colours of portals; it didn't add any challenge, and just made it so that the first few goes of the later levels were simply finding out where each portal led to.
Other than that, quite fun.
Enjoy the game mechanic, but control could use some work- the character movement just feels clunky.
Also, can get frustrating not being able to see whole map at once- it only serves to take up more time
I've only just started playing this game recently, but I've found there is a large degree of skill involved, and the 'luck' that everyone seems to be talking about is no more prevalent than in many other games of this nature.
Regardless, it is quite fun.