Purple screen is the loading bear.
When your project is on the Hopscotch server but not your device (ie anything in the community) you see the loading bear while it downloads. If you never get past that screen it’s likely an internet connection problem either on your end or ours.
When your project is on your iPad you won’t see the loading bear and will go directly to the editor or the player. If you end up on the play screen and it is stuck at white with a spinner that’s probably a problem with the project code that you wrote or the code for playing the project that we wrote. Or some bad combination of the two.