IDEAS:
Loads/Save, I think should just be at the beginning/end of levels it'll make life loads easier.
Editor: Definately each level needs to hold a slide show type thing (as andy said) and what levels it unlocks once that one is complete.
Non-Linear: If you always start on level one, everyone has to do that, then level one unlocks levels 2,4,6 say which you can then choose from, level 2 once complete unlocks 3,5 and level 4 unlocks 5... etc etc, this way you can work your way through the levels in certain orders but give it some kind of story so you don't have to do all the levels say, and you can choose what order you do them in to a certain extent. Dicuss...
Loads/Save, I think should just be at the beginning/end of levels it'll make life loads easier.
Editor: Definately each level needs to hold a slide show type thing (as andy said) and what levels it unlocks once that one is complete.
Non-Linear: If you always start on level one, everyone has to do that, then level one unlocks levels 2,4,6 say which you can then choose from, level 2 once complete unlocks 3,5 and level 4 unlocks 5... etc etc, this way you can work your way through the levels in certain orders but give it some kind of story so you don't have to do all the levels say, and you can choose what order you do them in to a certain extent. Dicuss...