I think that the idea of having to time clicks with the clock hands is a good mechanic for a hypno game, since it makes you have to focus on the spiral's center. As other people have said, I think the upgrades are probably too cheap, and get more expensive too slowly, since your profit scales out of control too quickly. Another thing that might be a good upgrade might be a hand rotation speed, so you can click more frequently. Also, I really like that you can change the subliminals it plays, but I think it would be interesting to see more pre-loaded sets of subliminals unlock after certain Intensity upgrade milestones.