The game was relatively easy to pick up and play, although I had trouble understanding how the tadpoles were to be captured at first. I'm still not sure, but it's something like you shoot/melee them, then they randomly decide to start moving, then you interact with them to send them to freedom. In the end I was able to beat the game but I very much feel like I muddled through, the way I did it didn't make sense to me, but seemed to work.
Guards turning instantly is something I'd definitely not want to see in a stealth game, many times a guard who was not looking at me at all saw me regardless, probably because it turned to look at me in a single frame.
The stealth mechanics didn't feel that fleshed out as I felt I could ignore/cheese it most of the time, the only time this wasn't true was when I had to rescue tadpoles in dead ends.
Aiming through holes in the wall was incredibly hard without any indication of where the projectile would land as well.