Thanks for trying out Our Adventure (prototype)!
I'm aware the balance is pretty messed up right now. It's probably one of the first things I'll be working on after a few days' worth of rest. I basically worked around 16 hours each day for the last week trying to create the game up to a point I'd feel comfortable releasing. Just one week ago the game ended abruptly when you register at the guild and that's like, 5 minutes of gameplay? I had (foolishly) put off creation of the enemies at that point and since I tried to crave them in at the last minute, well... I guess it shows.
You'll probably want to try a thief in the future versions, too. They will have some very useful (and even required, at points) utility skills such as "Find Secret Doors" that will allow you to reach areas in dungeons you won't otherwise be able to enter.
As what comes for the mines being laggy, it's probably because of lots of events here and there. I might consider using a preloader to see if that helps it anyhow.
The busts will be done by Punamaagi sometime in the future, I'm also considering to add some pictures for town inside areas (like the guildhouse or town hall), just like Etrian Odyssey. Gives you lots of immersion, I'd say.
I'll be sure to try your entry some day, too. I'm just going to have a few days' rest before returning to RPG Maker MV.