Creative game concept, and the one button control works well! I like the pixel art drawings of the characters, you captured their essence pretty well. They might look better if the filtering was turned off, so they looks sharper. Good job! :)
I had no filter. Shamefully i have to admit that i scaled it rather big - else everything would have required a magnifying glass to see. Non-Sharp-Fault was mine. Artist made superb pixel-arts.