Great, I went back to the first room to save the game, and apart from the fact that having to go back to the first room to save the game (at least, I didn't see any other way) is annoying enough per se, now the door to the next room is locked (probably due to a bug) and I only have 2 silver keys, so I'm stuck. Other than that, the navigation is a bit annoying, because you automatically jump upwards if you walk towards a higher spot, and if you don't want to do that, it is annoying because it takes a long time for the character to jump upwards and again to jump down. Actually, the jumping takes too long in general, so it's annoying either way. Come to think of it, this applies to normal navigation too. It's just too slow, so it gets tedious. Given that I couldn't really enjoy this game, I give it one star.