Thanks! I didn't think about making the colliders smaller, but that's a great idea! I made the colliers larger for the collectables in my last, so I'm not sure why this didn't cross my mind for this one. The colliders right now are pretty exact for the player, diamonds, and balloons. That's a great idea and I'll definitely fix that
Just goes to show you how player perception can often be "wrong". If you were going to push this further, I'd really dig into this question from the tester (me, but I'm trying to generalize). What made you feel like it wasn't your fault? This is also where it would be helpful to have players record themselves playing and to "play aloud" so that you have some insight into how they're feeling as they play.