It sounds like you're playing an old version. Make sure to play the most recent version, as a couple of (valid) points your mention here are already fixed/changed. Crouching doesn't change anything except for making you a smaller target for projectiles. I did this on purpose cause I don't want people to play the game while crouching 95% of the time. Atleast, that was what I started doing when I was playtesting it, so I removed it mid-way through development. Glad to see you like the game!