Thoughts after playing a bit

Haven't encountered any hidden quests yet. The roulette can be automated, or you can stop it yourself. There's a certain chance the roulette will slip, connecting at least one line. However, one item's effect slows down the roulette speed but prevents slipping, which isn't suitable for auto-play. You basically need to have potions ready for boss fights; relying on the roulette for HP recovery or shields is too slow.