Thanks for playing! Glad you like it and you managed to figure out how to do everything. Yes, the kaiju has a lot of health, 2000 points to be exactly. Tanks do 10 damage and Planes 15. Keep trying haha.
Expert tip: Repair all the yellow houses on the map once (Click + Right click). Build yellow houses in front of the blue house to avoid some damage. Build a red building and when you have the tank, put two and wait for the plane. Keep building yellow houses to make more money, but don’t abuse them.
Thanks again! :D