Thank`s for your answer @pietro. After reading your reply I decide to share my skills and experience I received with StallCather game. Maybe I start a new topic. Hope it will help other members.
FALSE STALLS
Let me explain this thing, what it is. After first few days I found best way for me to work with range control at the bottom to scroll movies. On movie I see how vessel flow by capillary. This capillary was little deeper to bottom, but other capillary closer to front cross it. In place where it crossed naturally is black dot that not moving. I double checked and marked this movie as flowing. It was very hard to detect this issue, and not receive any point for this. I was very disappointed when see that other 27 user marked it as stall. I write this because in some cases one or two experienced members can not have enough vote power over average answer of major users. In future roadmap noted that expert will review time-to-time random user results… Maybe we need better annotation system and some changes, like ALERT button or user reputation system to alert experts. So experts can review limited set of disputed movies that NEED expert answer. Do we need this, I want to hear from community what you think about it.
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Best regards, phpguru.