I quit!
I liked the game, but I found a bit unbalanced that some parts, specially with the bosses, are too hard and you end up relaying on reappearing and reappearing again, killing it little by little in between until you win. At the end that becomes an easy option: run towards it, and shoot as much as you can, die, reappear, repeat...
So I wen't thru it very well.
but then I couldn't manage with the last path to the key, I died too many times in that point and got bored...
Otherwise I liked it, it is a cute game