I wish there was a neutral option when reviewing games on Steam and choosing whether to recommend this game. I wouldn't not recommend it, but I'm also not certain I would recommend it either... It's one of those games that's not terrible but not great. I enjoy some of the puzzles, but find myself only able to play for about 20 minutes before getting bored. It feels like a shell for something that could/should have been more.
The gameplay is smooth however and the puzzles, which can at times be annoying, aren't overly difficult. If I found myself stumped at any point, I simply stopped for the day and when I started it up the next day with fresh eyes, I solved the puzzle right away. I find it plays just as easily whether using a mouse or a controller and didn't find myself preferring one over the other at all.
Graphically, while the art style has a certain charm to it, it can get monotous and at times ugly. I actually feel like I would've liked this game a lot more and could have forgiven its lackluster gameplay if it had just looked prettier. It feels bare partially because it looks bare. When you make a game as basic as Munin, you need to make it stand out in some other way, whether it be art direction or sound design or something like that. Speaking of sound design... I honestly can't even recall the sound in this game. It was that forgettable. Is there music? Probably. Are there sound effects? Probably. Nothing that stood out enough to me that I can actually bring to mind any of it though.
Overall Munin is an absolutely middling game. For the $.99 it's currently selling for on sale (which is what I paid for it), I'd say it's worth it. I would most definitely NOT pay the full price of $10 though. This feels like it shouldn't cost more than $5 at most, and honestly I can't help but feel kind of bad for those folks who've paid full price for a game that feels like a demo or the final project of an undergrad.