How long is it?

Just completed the first level and the corresponding achievement isn't unlocking.

Could maybe Robert Alvarez or someone make a game like this but with gravity? Like a platformer? I've never seen that done and I might eventually make a game like it but... You know the game Reproduction Man? How the gravity is utilized in the puzzles completed? If it would be possible to combine the puzzle solving with a turn based environment. At first that's what I thought this was, but there is no puzzle solving. Now, I like Fire Emblem as much as the next guy but I thought I had run into something e...