since you made all four tutorial levels, you should make some type of big final to finish it off before you continue making more levels, right? kinda like a epic boss battle that probably should be old times like the wild west and it should obviously have a gun cause who doesn't like guns also ooooooooo guns. since it is old theme wild west, it should be a cactus cause common knowledge right? yeah I am such a big fan and its not like this is bit so I even came up with art for how it should be. 
so good right?