There's an invisible link in the bottom of the game. The link forwards to the license page. Very annoying, because I nearly always click on it if I want to press a button in the lower part of the game.
The game itself is pretty good, but I don't understand the distribution of ressources. I have over 100 bullets, but my sniper turrets lack any. Sometimes I can't upgrade the turret range even with enough boards.
The game is boring. You always just to have to click "Grow leaf" or flower or something like that, wait one second for the animation and then another second before you can click on the next thing and repeat that. The slow animations are the main problem of the game: Waiting for the bees to fly from left to right doesn't add anything to the game.