For the app I could of implanted a calorie tracker that would track the amount of calorie and give suggestions about what to eat for a healthy amount.

I could have also implemented a sleep tracker that would tell if the amount of sleep you were getting was adequate it would have also of tracked the amount of sleep debt you have so you know if you need to catch up on sleep or not.

the code that handles the behaviour of cards info screens is extremely inefficient and unintuitive there are dramatically better way I could of handled the logic.

I could of implemented parallax card effect that would pan the card towards your mouse cursor.

i could of made the nav bar look and feel more intuitive to use by putting it at the bottom of the screen.