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Physics games can be found in every corner of the Android Market nowadays. There are so many of them it's hard to find a quality one out there. Crush the Castle is another physics-based game which focuses on knocking down different structures and crushing every person in it. Medals are earned for each level based on how many launches it takes to crush everyone.
The gameplay is very simple. Users start a launch from the trebuchet and then tap again to release the projectile. The game isn't anything super detailed but the physics of the game make it pretty entertaining. After passing various sections, different ammo will be unlocked and the ability to launch multiple stones will become one of your main weapons.
The game didn't bring anything too new throughout my trial, and eventually became pretty boring. Sometimes the projectiles wouldn't have any effect on the towers and that made for some pretty frustrating moments at times.
Overall the game was fun and was fairly addicting to play through. But after a while, it will grow somewhat monotonous. For the price it is listed at in the Android Market, it is a fair trade. It has just enough fun and puzzle to it. Check it out.