Simple graphics hide a deeply complex game, where there are some really interesting combinations of Relics and Orbs that can result in single-shot wins on late-stage games.  But a run can also be a complete disaster, depending on the luck of the RNG.  Kept me entertained for days as I achieved Challenge level 15 for all four classes.

By the way; try out the combo of Tactical Treat, Refreshing Punch, Light Shaft Potion, Duplicating Potion, and Leaf the Rest for Later with the  Duplicatorb Orb.