I'm back after hearing that the game is a lot like another game, Slice & Dice. I didn't know about that one so I went and bought it to try it out. So your homage made a sale for them.
After playing S&D a few rounds, I can honestly say there are some things I like better in your game: I like the slightly easier difficulty by default. That hits my sweet spot. I like the way the player has more control over what classes they'll get. I like your arrow drag mechanic, which feels more visceral than click, move, click. I like your hover tooltips, which give me information without unnecessary mouse-clicking. I like your unified HP, so I don't have to manage block for specific characters. It's a bit more casual than dice & slice, but there's room in the world for a variety of game difficulties.
There's nothing wrong with piling onto a game genre. Duke Nukeum was a clone of Doom, way back in the day. There's a thousand Slay the Spire variants now.
On the other hand, your dice assets do look very similar. So maybe more reskin could have been in order.
Overall though, I think you've improved on that game in many ways. Now you just need to add a bunch of content , maybe reskin the dice, and get it on Steam.