I'm half way through Guacamelee! and I have to say that I'm underwhelmed. Not because it isn't good but because it didn't match my expectations. While it does have solid controls, it doesn't feel like it earns the right to gate access because it is so short. When you go back to the old metroids or castlevanias, there's so much more variety to the environments in those games. While the art is nice, it doesn't suit the flow of your progression through the game. Not to say that I have an issue with the length of the game, there have been other shorter indie titles like The Swapper and Waking Mars that I love that were inspired by metroid in some way. Despite the good feel of the controls in Guacamelee, it's all for not because the enemies up until this point have never presented a challenge.
Does it get better?