First off, It looks and works great! Very slick and I dig the simplicity of the interface.
But you do bring up a good point, there isn't alot of game at the moment. This could be a great tool for people wanting to play the crypto market without the money.
Maybe add a way for users to switch between using the real-world data and using something to generate random crypto movements so users can get right into a busy trading day?
Also alot of people like to use bots on crypto markets, maybe have a way for users to attach their bots for testing or for a competition?