Thanks for checking out our little game!
Yup, I agree with what you are saying. We did plan to have shop, color lab, upgrades, etc. but we didn't got a chance to do all that.
If you would like to, you can follow along the progress for v2 version and maybe also add any suggestions you have in the github repo.
Github Repo: https://github.com/SanjayBoricha/out-of-color