I absolutely HATE TD games with a timer. I prefer a casual game where I can play at my own pace and click to send the next wave when I am ready. Not die when I get up and go to the fridge.
I started a game and messed up so I looked for a "restart" or "Menu" button. The only way I can find to start a new game is to refresh the whole page.
Also, game screen and text are way too small. Hurts my eyes.