Really good game

I had never really been interested in terraria until my sister urged me to try it. Im glad I did, the game is really fun and has great potential, I did find a few issues though (they are very small ones) first it is really difficult to aim and fire a gun. Every time I try (I got used to just tapping the screen where I wanted to fire) but if I try to fire to the right of the screen the aiming joystick thing would pop up and mess up my shot. Also the game sometimes crashes when you try to load a world but this only seems to happen one out of twenty times so it isnt too much of a problem. Also I cant figure out how to summon skeletron, I know you are supposed to talk to the old man in the dungeon but I cant seem to get it to work so now I cant progress in the game. I love this game but a few issues that need to be fixed

Player: Shadowheart38 about Terraria, v1.2.12785