I agree with the above comment - at least some help text is needed. At the beginning of the game, a player has no way to know how to get enough wood to build the first house.
Collecting wood in general seems to be very flawed, unless I missed a method (and, if I did, you need to tell the player their options). Manually clicking the forest grants 1 wood every 3 seconds and the rowboat grants 2 wood every 7 seconds (or so). To get the 50 wood needed for one of the lowest-level houses, that's over 2 minutes of manual clicking and just waiting. I dread to imagine the 50 solid minutes of manual clicking needed to buy one of the 1,000 wood buildings. This issue combines with the slow money income rate to set the pace of the game very low. I know you said that it's a casual experience but I believe that speeding up the earnings somewhat would make the game much more satisfying. Being able to spend your resources is much more fun than waiting to earn them.
I would reconsider the costings of the buildings as well - they're pretty inconsistent in a cost-per-person sense. Considering how long it would take to fill the map, there's no real point in aiming for the higher tiers of buildings as they generally don't grant you more income for your expenditure and you're missing out on potential income while you're saving up to buy them.
It seems that you designed the game so that a player could return and continue where they left off but when I did so, all of my lower-tier buildings had disappeared (though I kept the same population) and the rowboat stopped dropping off wood (but kept leaving and returning).
In general, you've got the basis of what could be a fun and satisfying game but the core of it needs work. I would maybe go back to the drawing board and make sure the very basics work really well before extrapolating out into the higher tiers and so on. I hope you continue to work on this and other games. I think there's potential.