Interesting mix of puzzle and town-building. I did notice one little 'bug', which is that if you click the building hud button in the bottom right while that button is hovering over an empty tile, it gets instantly placed down in that spot instead of letting you choose where to put it (in other words, it'd be better if placing wasn't possible while your mouse is hovering on the hud button). Otherwise, gameplay was smooth.
It's fun and fairly unique with a decent balance for difficulty - good job :)