The flicking mechanic works really well, and being able to control how far you can flick is really satisfying. Having the shmushes split is a really intersting take on the theme, and things can get pretty crazy once you take a few hits and have to deal with a screen full of them!
I think it'd really benefit from having a retry button on the screen at all times - whenever I mess up, and lose my last shmush off the edge of the screen, I have to wait 10-15 seconds before the game even reaches a fail state for me to retry.