My 6th grade basketball team is strong all around although help is needed in our offense. When we attemp to run a play it will occasionally break down, and this is where we get stuck. I run a motion that can be set high or low by using the 1 and 2 guards in up court spacing. I have been coaching 9-10 YO girls for 2 years and understand what the constraints you play under. Our lcal YMCA has a program with rules similar to yours.
Defense picks up at the top of the key, man to man only.
Really work the fundamentals with this age group. On offense, teach ball handling, passing, proper spacing, correct shooting form, offensive rebounding, setting screens and moving without the ball. Sounds like it started as something small, but now is growing. It doesn't sound like the offense, it sounds like confidence. In our rec league, we start new each year.