Having played it long enough to say that an health upgrade would make this too easy.
Is fine like this IMHO.
I would have given a 4/5, but since many people are lowering it for dumb reasons, I'm going with a 5/5.
Graphics and concept was nice (I'm christian before anyone complains, but don't find this offensive).
Still, the only usable character is Satan, the others are just too hard to use properly against such an AI.
3/5 for the effort.
Easy one, but I'm used to play Geo Challenge on Facebook.
^.^ Could use a better randomizer, since sometimes I got out at level 1 just because 3 african cities...
To "fix" lag I pause the game when it becomes unplayable and then go on playing after 30 seconds.
Not a real fix, but at least I can play till the end of big legions...