The UI looks not bad. You can easily claim and transfer and create addresses. I have tried and transferred a few of coins to a new testing account I just created. I am primarily using my testing account to help the testing.
If you don't want claim your coins now, you still can help the testing. You can just make up a seed and put it into the seed box and hit enter. Now you have an account with one address and zero coin. You can call it your testing account. With this account, you can create as many addresses as you want.
Creating addresses can help to increase the transactions in the network. The goal for this testing is to reach 1 millions of transactions. We only have under 1000 transactions now. So everyone can just create a testing account to start to generate new addresses to help. You don't need any coins to do so.
But if you want to play with some coins and make some transactions, you can post the addresses of your testing accounts here, I can send a few to you.