I have the game. Have hit 6 levels and 426000!! After the 3rd act u have infinite ammo!! The key to the act 1 is moving your bags in the mine cart shaft then park wheel B. at bottom of latter drop the bags in the Wheel B from the mine cart as you go by.....Act 2 the key is getting bags over to the 2nd lower screen and the drop down in the wheel B to finish the act. the rest of the acts are the same as act 2 but move just a bit faster with infinite ammo. What a great game!