It asked me to draw an helicopter, then a shovel, and guessed right in both cases. But I noticed that the training dataset was of poor quality: "shovel" drawing

It asked me to draw an helicopter, then a shovel, and guessed right in both cases. But I noticed that the training dataset was of poor quality: "shovel" drawings were full of helicopters. I also noticed it was very laggy on my phone, making it hard to draw anything before the end of the countdown.