This is cute, but ultimately unsatisfying to play.
In short, there are not enough player choices, and they don't matter as much as the whims of the Random Number Generator.
Once a dungeon starts, your basic actions are limited to:
_ Choosing which hero goes in which lane: Combat system is an ATB variant where 1-to-1 fights happen in each lane, with a few exceptions (if the RNG blesses you with the rare ranged weapon drop, for one). So you can manipulate combat and EXP gains by pulling the ol' switcheroo.
_ Activate character specials: Very often you'll want to click that ASAP, so not much of a choice.
_ Use potions/equip new loot: Again, little actual freedom here. Pick the bigger number and heal when health is low.
_ Pick your Level Up bonus once in a while.
Compare/contrast with what the RNG determines:
_ The loot you get: Get nothing but 10 +1 swords in a row, fail dungeon. Retry with the same party and stats (and basically the same strategy, since there's little leeway for that), get proper weapons, shields and potions and breeze through the level.
_ The random events you get: You could get a real good weapon drop from the gnome! Or have to choose between losing 1/3 of your party or all your inventory. Five times in a row.
_ The stat increases you can pick, out of 3, at level-up time. Need more health, or a stronger special? Why not have more charisma instead, or maybe some magic attack for that knight guy!
So what you do, what you actually have influence on, matters way too little compared to sheer luck (not the stat, you, the player's luck -- well, maybe if you're into that Quantified Self thing you think of it as a stat) (which is pretty grating, FYI, you NERD).
UI's a bit clumsy too (for instance: only the highest charisma in the party matters, so you have to memorize who that is or pause when you have the option of a charisma increase), and it feels somewhat grind-heavy / free-to-play-ish (you can get pets/merchants to mitigate the RNG, but 1. it's not nearly enough and 2. they cost a looot, and heeey is that a second type of currency?).