The way the codes are used in the game are very natural, I had to think hard to make the right combinations :-) really great game, makes up for a big RPG/Adventure game! I'd like to have a part 2 with more background on the whole planet...
Of course there is reason to play it when beaten, although Gemcraft Chapter 0 gives more replayability :)
For those who say this is not fast paced enough, try beating the first couple levels (to get used to the game) :-| or try level 58... still not past it
This song rocks, would be cool if there would be a medium badge too.
I'd love to download this song somewhere, it is hypnotizing and reminds me of Luigi's Mansion with a lot of undead enemies :-)
I like this game and unlike many comments, the game saves and you can continue later on. So 74 levels is not too much for this game, all the time new concepts of powerups. 5/5, very innovative!