From a mechanical stand point, this is fantastic stuff, the character feels great.
Most of the game I feel gives me time to try to figure out the movement because its obvious these few buttons can become very big things to deal with.
Then the added game elements over time like the geysers. Nothing wrong with this game, it feels like a professionally built game. Good job considering we had 6 days.
I will say that the time it took in exploration detracted me a little bit, so that's more of a pacing issue. That's all.