Yes, Unity (UNITY) is a Waves (WAVES) asset on their blockchain so your wallet address and backup seed phrase are on the same blockchain that powers the Waves DEX (decentralized exchange). This makes using the native exchange very easy. Create wallet, deposit BTC, purchase UNITY.
You can confirm it is the correct asset because the small ID number under will begin with "6Mz..." and there will be a large sell order from us for ~100k UNITY at a price of 0.0001 BTC per token
Remember the passwords used on Unity and Waves sites are local only so you can set anything but remember them. Also remember the exchange above is a DEX Decentralized Exchange which means your wallet is your account. When you buy on the exchange it goes directly from the selling wallet to you securely.. so you will see your tokens instantly in your wallet.