A good game, nice graphics, searching for the stars and runes sometimes well hidden is interesting as well as the mini quests for citizens, but some things could be fixed/improved:
1. On the stages with grass/rocks on the ground and near the ropes going down below you can sometimes get stucked like there was an invisible obstackle in front of you, while it is nothing there; it causes a problem when for example you need to run for a longer distance at the moment;
2. The game definitely needs one or two checkpoints on some stages, it is really making a player frustrated when almost gets a star and then for example gets killed on the very last razor just before getting it;
3. Maybe for some players it would be a good thing to allow the "up" button to be assigned to "jump" as well as "z", I personally prefer this type of steering scheme.
Withe these improvements I would definitely give this game the fully deserved 5 stars, keep it up, it can be a really perfect thing :-)