please don't block autoclickers when making this type of game. there's no reason for it. this is single player, no one is losing.
Autoclickers work fine, but you have to move the mouse at least a little bit between each click - I got it working by just drifting slow and lazy over each flower while it was engaged. Probably a quirk of the game engine. (After a certain point, autoclickers are pointless, though - you'll know it when you get there.)