So you are creating a game on blokoto , and if you ever wanted to create a Custom Looking World object such as a custom checkpoint or a teleported you either did build some extra stuff or just used the objects the way the game offered . eg for custom checkpoints:
right there u see there is a checkpoint under the model and the models collisions are disabled, whenever a player runs over that model they will get the checkpoint. but there is a caveat if they jump over it they wont get the checkpoint sadly. for teleporter case, i cant really think of a way to create custom looking teleporters, and there are other game objects as well if we think of, i think adding a feature to disable gameobjects vision would be cool, and also adding a feature to edit ‘ its collisions, eg: editing checkpoint collision, teleporter collision, this way creators are going to have more customization over their map