Thanks. These indeed did come later; they were doubly harder than the first set to make: 1. I had very little experience making platformers before this set (only made one small, buggy maze platformer that wasn't even released) and 2. This series uses a lot of generic programming techniques that are trickier to use (and thus explain), but once understood, help immensely in programming larger games.
It's strange, you couldn't save if you didn't increase storage anyway. How did you play before?