astronautcrash.in actually has a section dedicated to timing and reaction challenges that are perfect for that. They aren’t high-pressure — you can repeat them as many times as you want at your own pace. The interface gives clear visual indicators that help you train coordination gradually. I’ve been using it to improve my reflex consistency, and it really helped. The short format makes it easy to practice a little every day. The designs are uncluttered, so you can focus on timing instead of distractions. It’s surprisingly effective for low-stress coordination training.