Tenten starts with very basic enumeration, but it very quickly becomes an interesting box. It requires knowledge of how to use and edit exploits and combines it with thinking outside the box. After a very fun user, I was a bit disappointed with the simplicity of escalation to root, but it was still an enjoyable experience.
Blocky teaches us not to reuse our credentials everywhere. It begins with a simple enumeration. Then we have to decompile some jars. Finally, it ends with the simplest and easiest Linux enumeration. Still fun!