Over 4 years after the release and the game does not have charts and only two forum posts from long ago. Just in case there is interest in this game and users that may provide feedback, here are a couple thoughts for putting up charts.
1) Should items be prohibited or put on separate charts from no items?
The Ring Attractor and Shield Award make ring collection a little easier and the Mega Sprint enables the player to sprint through enemies. The Mega Grapple allows the player to instantly destroy an enemy after grappling off its shield. Most of the items can be used at some point through a playthrough and they would make for faster times. I do not think they have a big impact on how the game is run either. Charts will allow items unless there is a demand otherwise.
2) How should charts be categorized?
There are a number of existing categories that track time (Times, Extra, Races, Bosses) as well as the ability to create new categories. The game has one boss battle, not really worth its own category. I did not see another game that used Races with those like in this game. All of the levels could be put under Times with different Divisions distinguishing the various types of levels.
Sonic Boom: Fire & Ice is a similar style game also lacking charts. The first point is not applicable but the second point is with a wider variety of timed levels (tunnels, submarines, boats, races, and 4 bosses), most of which have rings to collect as well.