You can't turn around in the App Store without tripping over physics-based puzzlers and games with a hand-sketched, graph-paper aesthetic--but Doodle Bomb still manages to be a fun, above-average entry into these two crowded subgenres.
Your goal in Doodle Bomb is to throw bombs--as few as possible--to escape each level. From your torn-out-paper perch, you're trying to blow up a green control panel to open a door and end each level. Along the way you have to blow up blue control panels to activate parts of the environment (such as hinges or wheels) and either avoid or exploit magnets, gravity switches, pipes, and other environmental elements--including soldiers who will shoot your bombs mid-trajectory unless you can stun them or blow them up first as well as strange little mice that bounce your bombs high into the air. The intuitive bomb-throwing interface should be familiar to fans of similar games: you touch and release a crosshair to control each bomb's direction and velocity--the farther away your crosshair, the harder your throw.
As the levels get progressively more intricate and difficult, much of the game's strategy relies on timing your bombs precisely (each has a several-second fuse), and you're trying to finish each level at or under a "goal" number of bombs--but on the game's 40 "standard missions" (followed by 25 "master" missions), you can just skip to the next level if you can't achieve the goal. Often, you can also just throw dozens and dozens of bombs at your targets, if you don't mind a messy, over-par victory.
The entertainment in Doodle Bomb comes more from its silly aesthetic and arcade aiming than any head-scratching problem-solving, but puzzle fans will still find at least a few challenges, especially in the game's "master" levels. Mostly, though, Doodle Bomb is a pick-up-and-play puzzler that's light on difficulty but heavy on fun.