In Pop'd HD, you try to pop all the given number of balloons in the given amount of time. When you complete a level by popping all the balloons in time while avoiding TNT-carrying ones, a new level is unlocked. There are 9 levels in total, with increasing level of difficulty. There's also an arcade mode in which you try to pop as much as you can while avoiding TNTs.
This game is heavily reliant on RAM for hi-res textures and CPU for heavy physics. A quad-core device with a minimum of 512 megabytes of RAM is recommended for the game to work smoothly.