Hit and Knock Down is a fairground game in browser form: stacks of targets, a limited supply of baseballs, and the job of knocking everything down with as few throws as possible.
The physics are the puzzle. Hitting the bottom of a stack collapses it entirely, while a direct hit on the top knocks off one target and leaves the rest standing — so aiming is a structural question rather than an accuracy one.
Hit the base. Knocking out the bottom of a stack collapses everything above it, while a hit on the top removes one target and leaves the rest standing.
Yes — each level gives you a set number of baseballs, which is what turns it from a throwing gallery into a puzzle.
Yes — drag and release. Nothing to install.