I played this game on stream: https://www.twitch.tv/videos/2873552263?t=00h02m54s
Overall, I made it to the point of retrieving the sword, but died at the first orb. I couldn't figure out how to increase my strength and defense. I could kill slimes and some other monsters, but they didn't seem to give experience or anything to level up (or maybe I didn't kill enough).
The first puzzle to retrieve the sword was ok, but I recommend adding some hints that there are two buttons to be pressed. After I pressed the first button, I was like "hmm nothing happened", and on the second button, it would have been good to have a sound or notification say something like "you hear rumbling nearby..."
Also, perhaps the door to the first orb would open only after the sword is retrieved, so it's clearer. I did wander in there before getting the sword, but luckily (by design probably) I couldn't smash the orb.
I did like the little chats with the NPCs in the town, though I couldn't access the shop or the mage so I wasn't sure what the gold coins were for...