Hi, thank you so much for your comment.
I am actively working on the game, and I definitely need to add more upgrades (I have some ideas, don’t want to say too much about them :) ). This is the first release. Soon there will be more upgrades to unlock for the warrior, and the archer will get special action(s) (like Vampirism for the warrior). I have a lot of content and ideas on the roadmap. Stay tuned ! :)
I hope you still enjoyed the game and hope the next updates will fix your disappointment.