Stuck at the Menu

Whenever I go onto minecraft the main screen appears fine. I click on singleplayer and i hear the click sound. It brings me to the singleplayer menu. When i try to click on the world I want, nothing happens. There is no hover animation when you hover over the world you want. When I click, nothing happens.No sound or anything. When you scroll over the create new world or cancel button I get the hover over animation. The create new world and cancel button works but I still cannot click on my singleplayer world. The multiplayer menu works fine but not the singleplayer menu.