Munin offers quite an eerie setting. Using Norse Mythology, you control the title character, a raven and messenger to Odin, who has been stripped of her wings and reduced to being a mortal girl once more. Only able to walk around and jump a short distance, you have to help the girl reclaim her lost feathers and be strong once more. Fortunately, while Munin might be quite weak, you can control the environment through a series of rotations. It's an interesting puzzle game but it's quite unforgiving at times.
The main activity you'll be doing at any one time is rotating the tiles which enable you to move around the landscape. Tapping on them can often create new paths or open up areas that were previously inaccessible in their earlier guise. Soon enough, tapping on one tile causes multiple tiles to rotate which is when things start to get trickier. For one thing, you can't move a tile that you're standing on which immediately makes things more awkward.
Later chapters add extra twists such as water which must flow a certain way so that you can swim through particular areas. Another uses lasers to open up paths. Things soon get convoluted within Munin.
That's also where Munin's flaws become apparent. Insta-deaths soon become frequent for those who don't plan each step of the way and a death means losing all progress in that level. Something that soon infuriates when dealing with a complex stage. Such frustration is compounded by somewhat floaty jumping mechanics, meaning it's not advised to rely upon them too much.
It's unfortunate that later stages become a bit irritating as