On the learntomod homepage do a search for popular mods or click on what's hot. When you find a game you want to try, like spleef, click on the mod's page until you get to the < / c > edit screen, where you can see all the code. There should be a dropdown menu at the top of the editor screen - select copy. Then go to http://mod.learntomod.com/programs and create a new blockly mod. At the top of the editor screen, select paste
After the code saves, then press the mod button.
You should be able to run the game in Minecraft. (it won't play in the simulator). If your game starts lagging or failing to load, then clear out the rest of your mods in your mod chest by pressing the redstone. Be careful when playing new games, as some may overload your server with the size of its code or have problematic code that prevents you from entering your world on Minecraft - if that happens, you can reset your mod chest by downloading a new world.