I'll just go out and say that CotN is WELL worth your money. Not only is the gameplay easy to learn, and tons of fun once you get the hang of it, but the soundtrack is amazing — because it's YOUR music! In all seriousness though, the provided soundtrack that comes with the game does sound wonderful, and each song can be switched out with files from your computer. Doing this can result in some really crazy beats — sometimes surprisingly slow, sometimes hilariously, overwhelmingly fast! The maps appear to be randomly generated each time so when you inevitably die a bunch on the first level, you won't get bored seeing the same map (and as mentioned before, you can switch out music should it get old or repetitive). Loot is also random, although there are NPCs that you can (literally) unlock who will sell you loot that you can then find in the crypt. I only have two problems I have found with the game so far. One is that it was considerably cumbersome and confusing to figure out how to select files for the music. But some stumbling around and memorizing of my directories solved that relatively fast. Second, I have not been able to figure out how to use the "Manual Beats" option for custom music. It's name makes me think that there is a way to....well manually set the beats of the songs I've loaded, but I cannot understand how. All in all, Crypt of the NecroDancer is a beautiful, enjoyable, and often surprising game that anyone who liked titles like Audiosurf, and anyone who likes highly pixilated roguelikes will instantly fall in love with.
So far I am half-way through season 2 and I can say without a doubt that this was worth every cent! Chroma Squad is a fantastic turn-based rpg with plenty of goofy references and fun game mechanics. The only thing I don't like is that the soundtrack isn't that diverse so a lot of tracks are repeated and start to get old after a while.
