This game is really cool, it managed to capture the undead asylum perfectly for a 2D game, except there is no Oscar.
The controls (at least for keyboard) are a bit weird, but considering that dark souls keyboard controls aren't that great either, it's not so bad.
It's also a little buggy, especially with stairs and the asylum demon.
But as someone who loves the dark souls series, this game is absolutely impressive, and I love it :)