This is going to be the shortest review I've ever done.
Cactus is beyond a genius. You can't fully appreciate it unless you either play this on 'shrooms during a blizzard or decompile it and realize that it's just 2D sprites with shaders and layering tricks that are systematically deranging your senses. There is a way to win but there are many more ways to lose yourself against the pall of infinity, and I recommend you do so. It's easier than going to Peru and drinking Ayahuasca with the shamans, and much more Scandanavian.