This is very nice, and a clearly a lot of work in there. The art in the town is great! Also the music fits really well. I see the Mario 64 move set coming into play :). Only thing I think could use a little attention is the player controller. Just small things like the Olympic jump seemed a little weird and sudden, and you have to look down to grow the item under you, that sorta stuff.
One of those games that's easy to keep playing, nice work!