Build an awesome token service that uses TokenScript, see our medium article here: https://medium.com/alphawallet/eth-berlin-tokenscript-bounty-d02153bde3e3
1- Build an awesome DeFi token or contract that uses an existing DeFi service or simply create a cool token for whatever purpose you like while using TokenScript to run the token inside mobile and the web.
This could be anything from an investor delegate to a token that allows you access to a service.
Have a quick browse at our TokenScript repository here so that you can become familiar with the framework: https://github.com/AlphaWallet/TokenScript
You should be able to get up to speed relatively quickly but feel free to reach out to us should you have any difficulties.