Thanks for playing!
1. Yeah we started level design way too late and the artwork left a little to be desired. XD
2. It's briefly mentioned in the tutorial, but if you jump and press left mouse, you'll do a dive attack instead.
3. Originally we planned on having a full stealth system in the game. The eye shows whether or not enemies have detected you, but ultimately it's not all that helpful because we realized last minute that nobody would want to be stealthy with our bird assassin character.
4. Yep, we turned the gravity up to improve the feel of gameplay, but in retrospect, I can see how it could make the long "go up vertical" sections off the map somewhat tricky to navigate.