When using a guest account in the design game, there are several important limitations and considerations to keep in mind:

1. Data Loss: Any progress or design work created while playing as a guest account may be lost. This means that if you switch devices or log out, you might not be able to continue where you left off.

2. Inability to Transfer Data: Guest accounts typically do not allow data transfer between devices. If you start playing on one device as a guest and want to switch to another, you may have to start from scratch.

3. Limited Access to Game Features: Guest players often have limited access to important game features and privileges. This may include restricted access to certain tools, exclusive content, and discounts that are available to subscribed or registered users.