Quantum Protocol

Quantum Protocol is a PvE card game where you choose one of a few existing decks, and then expand that deck over the duration of a level by acquiring new cards as you defeat enemies. It's quite unique in terms of gameplay, and features multiple novel mechanics.
For starters, the game is asymmetrical. While both you and your enemy have a 5x2 board, your enemy's cards come in waves, each appearing after the last one is defeated. Each enemy card has a timer, indicating how many turns are left until it does an action. Meanwhile, you usually play cards from your hand, move cards around on the board, and choose which ones to activate. Each of these actions normally costs a turn, bringing you closer to the enemy's attacks. Each card can only be activated once, except after 5 turns, you can spend a turn to draw a card and refresh your board, allowing you to activate each card again. The actual loop generally relies on clearing your board often and building it up again, as you can choose to activate all your cards (even already activated ones) in a single row in just 1 turn if you discard them after. Many cards then return discarded cards back to your deck.

There are a lot more mechanics, definitely more than I care to list, but I feel that's the gist of it. While novel, these mechanics aren't necessarily good. I can't quite pinpoint my frustrations, which I suppose goes to show that they weren't that severe, but I never felt like there was a pleasant flow to the battle, despite the game advertising "it's always your turn". The general favorable emotion I get from deckbuilders is building a sort of machine that spirals to become better and better. Meanwhile here, I felt I was throwing a lot of trash onto the board, and instead of building up momentum, I was losing it the more the board got full. Sure, cleaning it up and starting fresh is a central game mechanic, but it's the opposite feeling from what I wanted. Add to that that your decks only last for the duration of a level, despite it possibly being half an hour long, and I really didn't feel I was getting anywhere in the game, short- nor long-term.
Oh, and if you were wondering about the visual novel aspect of the game, don't bother. There is a story, but it's very shallow, and only exists to provide context to the gameplay. That's fine, but don't expect to find a good read here.

Overall, Qunatum Protocol might be a fine game for you if you're a fan of card games, thinking, and prefer novelty to tried-and-true gameplay. The levels can be quite long, you can lose and have to reset to the beginning of the level, and you will probably be spending a lot of time reading and thinking, not playing. These aren't necessarily bad things though, just not something I enjoyed. As such, no recommendation from me, but I don't want to discourage you from trying, if the description seemed interesting.