Reading the comments, I saw that you made this game with the free version of Construct, well done!
A tower defence game (or chicken defence, I should say) is always a pleasure!
I had a small issue with the ‘retry’ button, which didn't reset the game to the correct wave of enemies. So I refreshed the page to start over from the beginning... and win!
The same went for the ‘New Game’ button, which simply didn't seem to work. But these are just minor details. Well done for this game :)