Thank you for playing, I'm very happy to hear you liked the theme, and even happier to hear you played as Dotty! Those are all really great ideas; an opponent or two and even some set-dressing NPCs would add a lot to the atmosphere, and I like the idea of random items and cart upgrades too. Puzzles or level specific events would be a great addition, and could probably be hooked into the challenge system currently in place. I can't promise all of this will make it into the next update, but at the very least, some new levels are on the way!