Almost feels like this is a polished game, just that I thought the hiding box will be just stand around the box act as a wall and I wasn't aware that there's a stone that I can press 'Z' to pick up, even though the tutorial had said so, until in the real level and the lights are on so that noticed that.
Sometimes I think I have hide around wall pretty well, still get caught as a guard's detection meter filling up. I don't know, maybe I suck at playing stealth, so I just run around and sprint straight to the destination. First level done, but a bit frustrated to play on second level as the spike rising up and I didn't noticed there's one like they are sitting there every corner.
Anyway, good stealth game you made!