The goal is clear, but is not achievable. Too many enemies, the eye appears and opens almost instantly, not to mention [1] and [2] buttons are too far to be reached fast.
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[1] and [2] keys are pretty close to WASD so do you have any suggestion for replacement for them?
When sinner is on low HP time for clikcing an eye is increased up to 1 second without any upgrades. Every "extra time" upgrade gives additional 0.25s. I think this isn't the easiest task to capture a sinner but it was intended.
I agree about too many enemies. The idea is that enemies should prevent you from catching other sinners and there should be a lot of them, but their number is sometimes frustrating.