Really like this game. I was writing a long detailed post about my thoughts before accidentally refreshing the page and now its all gone, forever.

So instead now I'll just say its a nice mix of party-based tactical battles with dungeon crawling. 

Is it infinite or is there a final dungeon floor?

Found some bugs:

• Summoned a Jelly onto a square that had a coin on it. The jelly didnt appear though, and the game continued as normal for a bit. At some point, the game CTD (crash to desktop, no error msg). Every time I reload, it repeats the last turn before crashing again. My guess is its supposed to be the summoned Jelly's turn but since it couldn't spawn (because the gold was on the square), it bugged out. This also means I can't continue and have to start a new game :(
• One time one of my guys died during a tense battle. I quit the game in rage and reloaded the next day. In the battle, the enemies which killed the guy would attack the dead guys corpse every turn. Interestingly, my characters could also attack the corpse, and get EXP for it. Not sure what happened, but I guess it's something to do with closing the game just as a character dies? 
• When I promote a character, the class promote buttons are still present on the left side, clicking one crashes the game (CTD). E.g. I promoted my "novice archer" to "archer",  and both the novice archer and archer buttons were still visible. I clicked "archer" again and got a CTD.

Other feedback:

• I wouldn't mind more traps and hazards in the levels (maybe more things like water or pits to push enemies into). At present I have not had much opportunities to make use of traps or barrels with the push, drag, etc commands very often.
• Inventory size feels small for a game where you can have 5+ characters. I think having a limited inventory size is good in general, so that you have to choose what to carry and what to drop, but ideally would prefer at least twice the size (maybe through upgrades at the shop)
• On that note, also being able to sell stuff would be really awesome.

All in all, great game. Aside from the top bug, has been an overall smooth experience and have been enjoying immensely. Hope these reports help!

Awesome, really amazing how you updated the game so fast. Being able to sell items to the shop and increased inventory size are really nice additions.

I have now finally beat the game, and wrote an article on my blog at: https://newretrogames.wordpress.com/2018/06/12/sigma-finite-dungeon/

Hope that it helps more people to find the game!

My final thoughts:

• Classic tactical combat!  Exactly what I was looking for.
• Difficulty felt right, I needed to make good use of all my abilities to survive combats.
• The variety of classes is really good and adds re-playability. 
• There is a really nice variety of skills and spells. 
• It was always exciting to find a Skill Master or Scrolls (which I could use to learn or upgrade spells).

And a few "wishlist" items, if you ever plan to expand the game further:

• There's a nice range of weapons but I didn't find many equipment upgrades and in general equipment didn't add much depth. In my three playthroughs, I tended to find some better equipment on the 2nd or 3rd floor (usually after the boss fight), and after that all the items dropped or in shops were usually worse than my current equipment, until near the end of the game. Maybe more variety of equipment types (e.g. helms, amulets, boots) in addition to weapon and armour would help provide more chances for upgrade options. Also, equipment with more variety of effects (e.g. attributes like strength or dex, some grant skills/spells, or some grant abilities like boots that increase moving +1 distance or archer gloves that increase the range of bow attacks, etc. ) would add more reason to invest in equipment and make strategic choices over equipping your team.

• Since you can now sell items to the shop, to balance things it's probably necessary to lower the amount of gold dropped by enemies / at the end of battle. I ended the game with about 6,000 gold, even after buying every skill and every useful item in shops. 
• Another healing class would be cool, for example the solider could promote to paladin with defensive abilities and heal.