TLDR: This is not really a dungeon-crawler... it's an RPG MATHS PUZZLE GAME
I realised the following things when I started unlocking their 'puzzles' which are basically advanced tutorials that don't do any hand holding.
Everyone keeps going on about how awesome this game is, I like it too, but it's not what' you would normally expect froma dungeon crawler, please let me explain.... forewarned is forearmed....
1st, This is not really a dungeon-crawler... it's a PUZZLE GAME It uses a lot of maths type puzzles - you need to figure out how many minions to kill so that you can level up, and how to do it efficiently... killing higher level baddies gains you an exp bonus, but you need to do it as much as possible so you don't lose XP from minions that are now "lower"... you need to snowball your XP. Levelling up gives you 100%health and mana, and you have to exploit this all game so that you don't use too many potions.... you'll need them for the boss in the level.
2nd, because it's only 10 minutes, things have to be simplified. You move around on a checkerboard style tabletop. revealing a tile (standing next to it = gaining visibility of the next tile) will restore some health and mana.
3rd, this is not a 10 minute game. You can play a dungeon in 10 minutes, sure, so you can play in 10 minute sessions, this can be a positive... but "just one more, it's only 10 minutes" will quickly translate into hours of game play.
4th This is a Rogue LITE - it does have a progression system where you can unlock new classes, abilities, etc between runs, in a similar way to Rogue Legacy. [A true rogue-like features permadeath where you lose everything and start again at level 1.]
For those that like this game, it's addictive. Look at people's play times, the ones that have reviewed this. there are some who have 15-30h, then there are those with 80-120 hours, and the odd one over 200h - that's about the point where you beat the game, from my understanding / reading on the wiki.
Do I recommend this game? That's such a hard one. Yes, If you know what you're getting into when you buy it, but the Store description is deceptive, and doesn't really explain just how this game works, and I was dissapointed about that, I wanted more 'hack n slash', and less 'calculating the next 7 steps to level up without using that mana pot' So for me, Although the game itself seems solid, I do like it, and I will play it some more, but I already know I won't clock it if it requires 200h it's a No.