I finished the demo and the game was pretty fun! I really liked the sound of shaking the shell it was super satisfying. Since the game is so short it doesn't overstay its welcome, but honestly I wouldn't want to shake my mouse around any longer than the length of the current demo, its a little tiring. Overall it was still a simple fun game.
I did find one bug: the purchase option for ending the demo remained on screen after closing the shop menu