How do I make an object go up and down

I do not think im sure what you mean, can you give me the .capx

GameThirsty Sadly the file is too big. I don't think it is a big deal, just a personal preference thing.

GameThirsty Also what do you mean about changing the angle of motion for the ones I want to go horizontal. The only thing I see is Speed, Acceleration and Gravity. The only other way would be change it in the events, but that would mess up the vertal

You have to set the angle of a bullet motion via event like in the example I gave you.

GameThirsty But what if I wanted horizontal and vertical bullets in the same layout?

You will have to make a new instance of the object you wish for vertical objects. Every instance of object going vertical, you cannot change it for horizontal or all of them will. Make two separate sprites. You should probably read up on instance picking.