Hey N88, to play the game you create, just go to the part on the main screen where you choose from the levels that are built into the game, and scroll down. The game you made should be under "Third Party Levels." Anyway, this is a great game, and it has unlimited replayability if you want to aim for that high score, or are willing to put some time and effort into learning and playing with the game and object editor.
Edit: The level editor can be EXTREMELY glitchy. It added a level that I knew nothing about, and crashed every time I tried to play that specific game again. Sometimes, it will also crash once you try to save an object, and when it starts to do that, it never allows you to edit objects again, forcing you to reinstall and lose everything you've created. This app needs a BIG update.