So idk how this even happened but I went to test my game and the start level doesn't even load. It will just load a random level and be frozen basically. At one point there was a blue line under level 1 and red under the rest, but idk if that has anything to do with it. Kinda stuck and lost :/
I would suggest you check the tutorials. There's loads of useful information. This should get you ready for using Buildbox: https://www.buildbox.com/tutorials/