All transactions are in the testnet. Please beware of transferring any REAL ETH from your MainNet wallets to the contracts in the playground. We won't be able to assist you in getting them back. Please address to guide to know how to get Metamask account and charge it with ETH from faucet. We strongly recommend using Metamask to get the best experience. The platform is not yet tested for compatibility with other extensions and\or wallets.