Simple Platform
This will show you how to create a platform game using a tiled map, and tile based collision detection.
Create Map
New Tiled Map
You will need a new tiled map, the tile size in the screen shot is 128 pixels, in the end i actually changed this to 32 x 32 and resized the tiles accordingly:
It is important to change the format of the map to Base64 gzip compressed: File:Plat tile layer format.gif
Add Tile Set
Now your map is created we need to add a tile set: