The big news this week is Nintendo teaming up with DeNA to bring original games based on its popular console games to mobile.

So, perhaps your interest in DeNA has gone up. Have you ever played one of the studio's games? If the answer is no, then maybe you should check out 3D cube puzzler Polyform.

Why that one? Well, DeNA decided to drop its price today. Until March 28th, you can get it for free rather than paying £2.29 / $2.99.

In it, you have to match four cubes of the same colour by twisting a 3D mass before it explodes. It's what DeNA calls a "fast twitch brain twister."

It has 30 levels with three difficulty variations. You can also unlock special cubes and compete against friends.

Download Polyform for free before March 28th on the App Store.