Thanks for playing! As far as the intro is concerned, if you die or beat the game, there is a retry button. The retry doesn't repeat the intro. I hadn't planned on people refreshing the page after going to it initially. My original intent was to have the option to skip the intro but we ran out of time and I didn't want people to accidentally skip it and not know there was an intro. I also wanted to have a menu for the music/sound effects and upgradable towers, but ran into a few hiccups along the way and didn't get to finish everything.