What's the point of mining? Since gold isn't useful for anything else there's no choices, you just put up as many mines as possible as soon as possible. There's also just not enough going on. The turrets are too similar and the maps are pretty bland. This is the kind of game that would have been acceptable 10 years ago, but now there are just too many better options.
The problem with this game is that there's no change. It feels exactly the same the whole time that I'm playing. I want something to react to.
I think this game would be better with a timer. Or force the player to clear a specific line every X moves. Then the timer can get shorter or the number of moves shorter and you can feel like the game is different as you go. Right now I think it might be possible to play forever.
This is not a platformer. You can't jump and if you pay any attention you will notice that the whole thing is on a grid. It's just a puzzle game, no platforming involved.
I think if you equip your 4 soldiers with assault rifles and magnus with a grenade launcher, all you need to do for the last level is kill the big guy and then defend for the whole time and you will win.
This has the same problems/strengths as the old one. The cut-scenes are reasonably funny but it's definitely lacking something, namely any difficulty at all. Also, why did you make the knight completely useless? At least in the last one he dealt the most damage.
Your biggest problem is not what anyone has said about upgrades. Ignore them. Your biggest problem is one of pacing. Get rid of the dead time between waves and speed everything up by a little bit. You created a top down shooter that plays differently than other top down shooters, don't get rid of that.
This game's difficulty is WAY off, I'm pretty sure I could beat it w/o upgrades or with only the priestess. Spawn more/stronger enemies and get rid of cooldowns. The abilities are situational enough that you do not always want to use them anyway and right now they are literally useless.
I suggest getting rid of treasure tiles and getting rid of priest tiles and then rebalance the enemies so that ranged is not as much of a pain. This would make the melee heroes better, and would keep the battles from being auto pilot with full priest and archer walls.
There's a bug where if you change a hero's type with cheese and then change it's type with an item, it will revert back to it's original type and will no longer change types with an item.
 "NGU IDLE"){kind=icon}
 "Puzzle Fuzz: Idle Stories"){kind=icon}
 "Ancient Planet"){kind=icon}
 "SIRTET"){kind=icon}
 "Cuboy: Cubeture 2"){kind=icon}
 "Color Pic-a-Pix Light Vol 1"){kind=icon}
 "Pick and Dig 3"){kind=icon}
 "Hands of War Tower Defense"){kind=icon}
 "Civilizations Wars Ice Legend"){kind=icon}
 "XenoSquad"){kind=icon}
 "Faultline"){kind=icon}
 "Flagstaff: Chapter Two"){kind=icon}
 "Not Your War"){kind=icon}
 "Pestilence Z"){kind=icon}
 "Flagstaff: Chapter One"){kind=icon}
 "King's Guard"){kind=icon}
 "Epic Combo!"){kind=icon}
 "Blobble Wars"){kind=icon}
 "Protector IV"){kind=icon}
 "Meeblings 2"){kind=icon}
Tetris is pure, Sirtet should be the same. we grew up with pure games not Candy Crash