A free program for Android, by Halfbrick Studios.

Monster Dash is an action-packed free to play run and gun game with tons of unique monsters and weapons to shoot them with! Your mission is to destroy the monsters that have taken over this universe. And the best way to do that is to dash across the various worlds full of these monsters. But be warned, because they will do everything they can to stop you. You will need to find the most powerful weapons to destroy them. And if you do not have them, you will not be able to survive. So make sure that you have them before you start playing the game.

In Monster Dash, you can choose from a wide variety of weapons. And each weapon has its own unique power and strength. But be warned, the more powerful the weapon, the more damage you will do.