This game has a great concept and was a lot of fun! I'm a fan of city builder games, so to take the opposite approach and actively destruct a city was interesting.
The levels are designed well and the difficulty ramps up at a nice pace. I like that each new power is introduced on a simple level, and its strength can be easily figured out without the need for a text explanation. I particularly liked the last level, where I had to coordinate my three powers. It showed the game's potential as a strategic/puzzle game.
While playing the first few levels, I would have appreciated info being shown on what a building was when I moused over it. I wasn't sure what the function of the two fish-related buildings were. However, as I played more things made sense. I like that each different type of villager is distinguishable and doing some simple observation teaches you about their behavior.
I was a bit confused by the level of polish, because some things were really well done, like the character art, and some things could have been easily fixed, like the dialogue text.
With a bit of polish and additional sounds, you would have the base for a great game here. Good work! The potential buildings/powers you can add are seemingly endless. I would love to play more levels!