Haha, this was really fun! I like how it switches up just enough to keep things interesting, and the game is just the right length. I've never been more excited about shark lifting in my life!
I alternated two fingers on my mouse button so my hand never got tired. I don't know if tensing up just one finger to press rapidly helps you to get a higher score than I did, but either way it's fun just playing through the game :-)