Alright. When the test version is ready, just send a download link to my email or share it to me via google drive. I'm interested to see what it's like in Unity.
Also, to place tiles, use the tile map editor. To place enemies and other objects, go to the prefabs folder and drag them to the point where you want them to be. The spinning mushroom platforms are currently unfinished.
Ok, thanks for telling me. I've actually used a super mario bros level editor before called super mario bros game and builder which I used to make a fangame called Mario's Quest. Here's a video of it.