Use the editor to paint the level. Use 0 to show and hide the editor. While in Editor, press p to go inside pin editor. Use 1,2,3 to go to layers 1,2,3 respectively(Only when you are not in the pin editor) Clicking the layer number while you are in the layer will switch on onion mode. Onion mode on every layer will show the specific tiles placed on that layer. Pin editor will allow you to mark the collision points of the tiles. Press 1( while in editor) to add a new collision pin. Press x to remove that pin. the color of the collision pin is red. I have already marked the pins. You can also edit them. Now the Player can collide with the other items.
Thanks to griffpatch for youtube tutorial and assets.