Tap to keep the ninja jumping and fire the laser at the TNTs to destroy the stacks of Doom Blocks and be able to move past them. If you crash into one of the spiky Doom Blocks, or fall on the ground, its game over!
Since the evil-faced Doom Blocks are impervious to the lasers, the only way to destroy them is to shoot the TNTs and blow them up. Otherwise, there is no way to get past them. Earn one point for each TNT you destroy, and collect as many yellow diamonds as possible to unlock new characters.