Game development crossroad

I finally added new enemies with their new spells. I also got around to adding some flavor to the game, like spell explosion effects, enemy death effects, and more sounds.

But now I need to figure out where to go with this, and especially how to balance the stealing mechanics, since I've been mostly programming, not doing game design.

At the very least, I need to decide whether to make it a roguelike or a level-based game, maybe even some puzzle...