Took a minute to figure out that I needed to click on which character to use. The pick any two mechanic is good, but would be better if there were a few more to choose from - this concept could potentially allow you to beat the levels in different ways, which could be fun.
Presentation wise, try to match the pixel density of the canvas to avoid the blurry text. Also see if next time you could avoid adding buttons on the home screen for levels that aren't there yet, this game didn't really need a home screen :)
Good job