So, I finished the demo, and these are my thoughts:
1) The combat is unbalanced as is. Because you use the default combat engine basic attacks have an inherent miss chance. The Bats also do too much damage (45-55). This means that in the tutorial fight, if you miss your first attack you're guaranteed to die, and if you miss the second attack there's a very high chance to die, though not guaranteed. I recommend reducing Bat damage to the 30-36 range. The battle with the fish in the minigame, while I like the difficulty of it as a miniboss, is also flawed in that you can be caught unprepared and be unable to win it because you have no potions on you. This is not good when it can happen randomly while grinding gold.
2) Tile collision needs to be improved, specifically regarding bushes. One example I can give is that by passing trough the bush at your house you can actually glitch into the house model, and then enter trough the door from there. Right now it's not much of an issue, but I can see this glitch getting people possibly permanently stuck in the future if not addressed.
3) The game can randomly crash even without giving an error. I have had this twice: Once when picking the 5th Mushroom in the labyrinth, and once when exiting one of the scenes when in the gallery. I have no idea what could have happened to cause those crashes, because trying to replicate them didn't give any results.
4) Some translations are missing and some text is still in Russian (the sign by your house, the alchemist after you got his outfit piece).
5) The art style, while not bad, is not outstanding either. This doesn't mean you should look into someone else to do the drawings for you (unless the art is already commissioned), this just means that you need to continue practicing and your skill will gradually improve. I quite like it to be honest, but I can see you have talent and potential, and as such I feel like you shouldn't let it go to waste.