Every single level i play, the game will go to the esc menu, and wont let me hit continue and I have to restart the level, It also wont let me switch grab packs, I have tried uninstalling and nothing works.
Read through the forums. For the restarts, just hit enter before the end of the level. Also, sometimes even just wearing a certain hat can make the level glitch out.
As for grab packs and what not, there's no good way for me to teach you without being right next to you. Watch tutorials or whatever on the forums because everyone has struggled through it to figure it out.
You'll be much better off if you figure it out on your own anyway. You'll be an expert in no time.
Side note: I'm assuming all the grab packs and downloads went to shit after Mega Upload went down because that's where everything was.