Hi! Thanks for playing and for your feedback! Like you've said, there is still a ton of work to do before this resembles a finished product. For now I've put out two battles as that is the biggest element of this game that needs programming and testing. I am planning to add a small overworld in version .3, as well as story and more combat features in later updates.
As for the confusion during the battle, I do play on making a in-game tutorial so that there won't be any confusion when playing the real game. The tutorial isn't my top priority at the moment, however. As a tip for fighting the enemies, basically only use the sword for the time being. It is the only thing that does damage to the slime. The shield will have uses in the future, but for right now just stick to the sword. Also once you get low on energy always remember to take a turn to focus.
Follow my twitter if you want to be updated about when version .3 goes live. And again thank you for playing!