I think the concept is cool and the first 5 levels are very fun. However, the 6th level is mostly impossible: for a population of 320 I need to place 32 houses. The randomisation of the tiles prevented that and only gave me 17 houses out of 51 visible tiles:
Note, that even though my building strategy was flawed (at an optimum I only could have placed 24 houses), what strategy you can actually play heavily depends on the randomisation.
Two additional things I noticed:
- this is not true: "Once the house fulfills these conditions, its appearance changes"
- the music only plays on the left stereo channel