Cute graphics, and it could be really fun if given more features!
The day 5 quota is really hard tho and I'm also not sure if its possible.
I'd say bringing in a system where you can introduce a system that lets you trade risk for higher earnings or a faster production time, and maybe a shop that can improve your islands efficiency with a trade off of having downtime before it becomes active again. Things that would give the player more options and can help change up future playthroughs.