here are the current rules and conditions:
_ 2 players mode (Sonic + Tails).
_ collect all individual rings (or the maximum for unreachable ones).
_ allow to use glitches or zips to collect rings faster or to reach the "unreachable" ones.
_ finish each act WITHOUT losing the rings, but you can lose sheild.
_the last rule about ring monitor isn't decided yet... I'm waiting for advices.
Have a nice work! Don't forget to contact me after each WIP you make =)