The mouse hover interactions would be up to you, that’s a little too game specific for me to focus on.
I may get into sound in the future but its lower on the priority list.
I’m already doing one line trace on the Birds for simple ground avoidance, i may get more into this at a later date as well.
updating and re-visiting animations is always on the list of things to do. Just look at the difference from version 1.0 to 2.0 