How was sneaking? The sneaking was good. I like the lights and the darkness contrast.
Was it intuitive? Yes. Once you get the groove of it at the beginning of the level, the game becomes easy to pass.
How was whetzel detection (ex. range, accuracy of detection)? The detection was good. The invisibility button didn't work at times, which I didn't understand why since I activated the button before I was near the detection area, and it still followed me.
Do you like your move speed? It's good.
What do you think of the map size? It's big and maze like. I think the areas that have a dead end should have a power up or a boss that traps you in the area and you have to defeat it in order to advance.
What skills would make it more fun? More challenging? The skill for a run/dash button to transition from areas quickly without detection. If the enemies actually did some damage, that would make it more fun and challenging. Like the fast enemy popping in and doing damage. That's a good way to keep a player from an area and have them come up with a strategy, rather than just run around shooting everything. Maybe a finite set of ammo or a cooldown timer would be nice as well. Defeats the purpose of sneaking being able to shoot and kill everything.
Did you like the music and volume level? I think the music is the best part of the game.